Geometry Benchmarks

Revise August 2007

Mathematical reasoning and problem solving processes should be incorporated throughout all mathematics standards. Students should use a variety of methods, such as words, numbers, symbols, charts, graphs, tables, diagrams, and models to communicate mathematical information and to explain mathematical reasoning and concepts.

Standard 1: Number and Operation

Students will deepen their understanding of real numbers by applying properties of rational numbers and exponents and by identifying exact and approximate roots. Students will use positive and negative numbers, absolute value, fractions, decimals, percentages, and scientific notation. Students will use the proper order of operations and perform operations with rational numbers. Students will apply number sense to everyday situations and judge reasonableness of answers.

 

Goal

The student will:

Content Knowledge and Skills:

Benchmarks:

1.1  Understand and use numbers.

1.  Apply properties of rational numbers.

1.  Use properties of the real number system to complete algebraic proofs.

 

2.  Understand properties of the real number system.

1.  Understand the real number system by examining relationships between its subsets.

 

3.  Apply properties of exponents

1.  Square and cube numerical expressions.

 

4.  Understand properties of roots

1.  Find the square roots and cube root of numerical expressions.

2.  Identify exact and approximate roots without simplification.

3.  Simplify radical expressions.

 

5.  Solve problems using number theory concepts such as factors, multiples, and primes

1.  Find the largest size square tile that could be used to tile two rooms of different dimensions using only whole tile.

2.  Use prime factorization to simplify radical expressions.

 

6.  Use appropriate vocabulary.

3.  See attached vocabulary.

1.2  Perform computations accurately.

1.  Use the proper order of operations. Perform operations with real  numbers.

1.  Evaluate and simplify expressions

2.  Use absolute value to find the distance between two points on the number line.

3.  Convert percent to decimal form and back

4.  Compute percents

1.3  Estimate and judge reasonableness of results.

1.  Apply number sense to every day situations.

1.  Estimate the amount of material needed to complete a building project.

2.  Identify that error acumulates in a computation when there is rounding.

1.  Compute exact and approximate answers involving irrational values such as pi and square roots.

                                                                                                                                                                       

Standard 2: Concepts and Principles of Measurement

 Students will formulate and use proportions, ratios, and scaling. Students will apply concepts of rates and direct and indirect measurements. Students will evaluate given measurement formulas for two- and three- dimensional objects.

 

Content Standard -

 The student will:

Content Knowledge and Skills:

Benchmarks:

2.1  Understand and use customary and metric measurements.

1.  Use geometric formulas to estimate and compute perimeter, circumference, area, surface area, and volume.

 

 

1.  Estimate and compute the perimeter of regular and irregular polygons.

2.  Estimate and compute the area of an irregularly shaped figure.

3.  Find the circumference of a circle given the radius, diameter, or the area of the circle.

4.  Estimate and calculate the area of polygons such as triangles, parallelograms, rhombi, squares, rectangles, trapezoids, regular pentagons, regular hexagons, and regular octagons.

5.  Estimate and calculate the area of circles, sectors and segments of circles.

6.  Estimate and calculate the lateral and total surface area of three-dimensional objects including cylinders, pyramids, prisms, cones, and spheres.

7.  Calculate the volume of three-dimensional objects including cylinders, pyramids, prisms, cones, and spheres.

8.  Use the relationship between the volume of a pyramid and the volume of a corresponding prism and the relationship between the volume of a cone and volume of a corresponding cylinder.

2.  Solve problems involving circumference, perimeter, or area of triangles, circles, and rectangles.

1.  Find the area of a circle inscribed in a square and given the coordinates for the 4 points of tangency.

2.  Determine volume and surface area in a problem requiring multiple calculations within the context of a real life scenario

3.  Find the area of the largest circle that can be inscribed in a square with a given area.

2.2  Apply the concepts of rates, ratios, and proportions.

1.  Use rates, ratios, proportions, map scales, and scale factors (one- and two- dimensional) in problem solving situations.

1.  Compute geometric mean.

2.  Describe and apply the similarity relationships for triangles.

Identify the scale factor of similar two-dimensional figures

3.  Solve ratio and proportion problems involving similar figures and their linear measurements, area, and volume.

4.  Use proportions to solve scale drawing problems.

2.  Apply concepts of rates and direct and indirect measurements.

1.  Find the height of an object using indirect methods such as Thales’ method of shadows, mirror reflection, and trigonometric ratios.

3.  Construct equivalent units, comparable units, and conversions.

 

1.  Create conversion factors to convert from one unit of measure to another.

2.  Convert between square units i.e. convert between square inches and square feet.

2.3  Apply dimensional analysis

1.  Use customary and metric units and their relationship to one another and to real world application involving length, area, capacity, weight, time, and temperature.

1.  Compute the cost, amount of materials needed, and time needed to complete a project such as building a shed, sewing a quilt, or constructing a model.

2.4.  Apply  appropriate techniques and tools to determine measurements.

1.  Determine and use appropriate units.

1.  Understand when to use linear, square, or cubic measures.

2.  Apply the Protractor Postulate.  Use protractors to measure and compare angles. 

3.  Estimate the measure of a given angle.

4.        Apply the Ruler Postulate.  Measure distance using customary units and metric units with appropriate unit labels

2.  Approximate error in mesurement situations.

1.  Understand tolerance, precision, and their applications.

2.  Understand that error accumulates in a computation when there is rounding at intermediate steps.

3.  Calculate percent error.

                                                                                                                                                           

 

Standard 3 Concepts and Language of Algebra and Functions

Students will use appropriate procedures for manipulating and simplifying algebraic expressions involving variables, integers, rational numbers, and for solving multi-step, first-degree equations and inequalities. Students will understand the concept and applications of functions and mathematical models.

 

Content Standard -

The student will:

Content Knowledge and Skills:

Benchmarks

3.1  Use algebraic symbolism as a tool to represent mathematical relationships.

1.  Represent mathemetical relationships using variables, expressions, linear equations, and inequalities.

1.  Define a variable and write an equation to solve problems in geometric situations such find the value of x for which line l is parallel to line m.

3.2  Evaluate algebraic expressions.

1.  Use appropriate procedures for manipulating and simplifying algebraic expressions involving variables, integers, and rational numbers.

1.  Solve problems that use variables in expressions describing geometric quantities by solving for one variable.

3.3  Solve algebraic equations and  inequalities.

1.  Use appropriate procedures to solve multi-step, first-degree equations and inequalities such as

      3(2x - 5) = 5x + 7

       or 3(2x – 5)> 5x +7.

1.  Use inequalities to solve problems involving the triangle inequality theorem, hinge theorem, and exterior angle theorem.

 

 

2.       Differentiate between linear and non-linear equations and graphs.

     

1.  Use slope-intercept, point-slope, and standard form of linear equations.

2.  Identify linear equation for a straight line.

3.  Graph a circle and write the equation of a circle in standard form.

3.4  Solve simple linear systems of equations.

1.  Understand and use appropriate procedures to solve simple linear systems of equations.

x + y = 7

2x + 3y = 21

1.  Solve systems of linear equations in geometric context.

 

                                                                                                                                                           

 

Standard 4 Concepts and Principles of Geometry

Students will recognize congruency and similarity of two-dimensional figures. Students will identify and use similarity as it relates to size variations in two- and three- dimensional objects. Given the Pythagorean Theorem, students will calculate missing side lengths of right triangles. Students will represent linear relationships using tables, graphs, and mathematical symbols. Students will interpret attributes of linear relationships such as slope, rate of change, and intercepts.  Students will use logic to make and evaluate mathematical arguments. Students will recognize and use properties of points, lines, planes, segments, rays, parallel lines, planes, angles, circles, and polygon.

 

Content Standard -

The student will:

Content Knowledge and Skills:

Benchmarks

4.1   Apply concepts of size, shape, and spatial relationships.

1.  Understand congruence and similarity of two-dimensional figures including the concepts of reflection, rotation and translation.

 

1.   Identify congruent angles and segments.

2.  Identify congruent triangles and name corresponding parts of congruent triangles.

3.   Prove figures are congruent or similar.

4.   Identify a polygon according to its number of sides (e.g. quadrilateral, pentagon, and decagon) and describe polygons according to their characteristics (e.g. regular, similar).

5.   Comprehend congruence and similarity as it applies to transformations

6.   Rotate and flip figures on a coordinate graph, understanding the line of reflection and how a point transposed across that line is determined.

7.Perform transformations such as translations, rotations, reflections, dilations.

2.  Recognize and use similarity as it relates to size variations in two-and three-dimensional objects.

 

1.  Create and use models to represent two- and three- dimensional geometric objects as a means of problem solving

2.  Create a drawing to scale of a geometric figure.

3.  Use the relationships between the ratios of the areas and volumes of similar solids.

3.  Recognize and use properties of points, lines, and planes.

1.  Name and use relationships among lines, segments, and rays (e.g. parallel, perpendicular, intersecting).

2.  Name relationships among points (e.g. collinear, coplanar).

3.  Construct, using a straight edge and compass, congruent segments, congruent angles, perpendicular bisector, angle bisector, parallel lines.

4.  Recognize and use angle relationships.

1.  Classify /distinguish angles by their degree measure (e.g. acute, right, obtuse, and straight).

2.  Distinguish among supplementary, complementary, corresponding, interior, exterior, central, and inscribed angles.

3.  Find the complement and supplement of angles.

4.  Solve problems involving adjacent, vertical, exterior, complementary, and supplementary angles.

5.  Recognize and use properties of parallel lines.

1.  Solve for missing angle in problems involving parallel lines cut by a transversal.

2.  Find missing segment lengths for diagrams involving three or more parallel lines cut by two transversals.

3.  Distinguish between parallel lines and skew lines.

4.  Identify the special angle pairs formed by parallel lines and a transversal.

5.  Apply the properties of special angle pairs formed by parallel lines and the transversal/

6.  Formally or informally prove lines are parallel using special angle properties.

6.  Recognize and use properties of circles.

 

1.  Identify the parts of a circle (e.g. center, radius, circumference, diameter, chord, secant, tangent, major arc and minor arc) and show how these parts interrelate.

2.  Find the measure of angles and arcs related to circles (e.g. central, inscribed, angles formed by chords, secants, tangents) and lengths of segments formed inside and outside circles.

3.  Identify the measure of inscribed and central angles and intercepted arcs.

7.  Recognize and use properties of polygons.

1.  Represent problems involving triangles with an appropriate diagram and apply properties.

2.  Identify the parts of triangle (e.g. hypotenuse, altitude, angle bisector, perpendicular bisector)

3.  Identify/classify triangles by their angle measure and side lengths (e.g. acute, obtuse, right, scalene, isosceles, equilateral).

4.  Use and apply properties of isosceles triangles.

5.  Classify polygons (by sides/convex/concave)

6.  Find angles related to polygons (e.g. interior and exterior)

7.  Use the triangle inequality theorem to solve problems involving triangles

8.  Use properties of midsegments to solve problems.

9.  Find the length of altitudes, medians, and angle bisectors within triangles.

10.  Find missing angles and side lengths of quadrilateral for which diagonal length have been given.

11.  Identify parts of quadrilaterals (e.g. apothem, base, and diagonal)

12.  Classify special quadrilateral as parallelograms, rhombi, rectangles, squares, kites, trapezoids, and isosceles trapezoids.

13.  Recognize and use properties of parallelograms and other special quadrilaterals such as rectangles, squares, rhombi, and trapezoids.

14.  Model problems with quadrilaterals and apply properties.

15.  Model problems with polygons and apply properties.

16.  Find the angles of a polygon (e.g. central, exterior, and interior) and the sum of interior and exterior angles.

8.  Recognize and use properties of space figures.

 

 

 

 

 

1.  Identify three-dimensional figures and their parts (e.g. cylinder, cone, edge, face, vertex, and base).

2.  Identify a polyhedron according to the number of its faces (e.g. tetrahedron, hexahedron, and octahedron) and describe the number of vertices and edges.

4.2  Apply the geometry of right triangles.

1.  Use the Pythagorean Theorem to solve problems.

 

1.  Find the center of a circle using inscribed right triangles.

2.  Use the Pythagorean Theorem and its converse to find missing side lengths and determine whether a triangle is acute, right, or obtuse.

3.  Determine and use Pythagorean triples.

 

2.  Use trigonometric ratio methods to solve problems

1.  Express the trigonometric functions as ratios.

2.  Define and discuss the relationships among the sine, cosine, and tangent ratios.

3.  Use sine, cosine, and tangent ratios to find missing angles and side lengths of triangles.

4.  Solve real-world trigonometry problems, and include the angle of depression or elevation in calculations.

5.  Use the Law of Sines to solve problems.

 

3.  Use the properties of special right triangles to solve problems.

1.  Find missing angle measures and side lengths for special right triangles.

2.  Use properties of special right triangles (30-60-90, 45-45-90) to find the length of apothem and radius of regular triangles, quadrilaterals, and hexagons.

 

4.3  Apply graphing in  two dimensions.

1.  Identify attributes of the Cartesian Coordinate System, such as quadrants, origin, and axis.

 

1.  Find numerical unknowns related to the coordinate plane (e.g. distance, midpoint, slope, coordinate)

2.  Use a transformation to map a preimage onto an image.

3.   Determine endpoints and midpoint of a line segment on a coordinate graph.

2.  Graph scatter plots and identify informal trend lines.

1.  Measure the circumference and diameter of several circular objects. Create a scatter plot of the data and graph a trend line.

2.  Represent experimental data with graphs.

3.  Identify positive and negative correlations.

1.  Investigate the correlation of the circumference to the diameter of a circle.

 

4.  Understand the characteristics and uses of vectors.

1.  Apply vectors to realistic situations.

2.  Determine the magnitude and direction of a vector given the coordinates of the initial and terminal points.

4.4  Represent and graph    linear relationships.

1.  Create graphs and equations for linear relationships.

1.  Write a linear equation based on the graph of the equation.

 

2.  Represent linear relationships using tables graphs, and mathematical symbols

1.  Graph linear equations with one and two variables.

 

3.  Interpret attributes of linear relationships such as slope, rate of change, and intercepts.

1.  Find the slope of a line given two points on        the line or the graph of the line.

2.  Understand the concepts of parallel and      perpendicular lines and their slopes are related.

3.  Write the equations of parallel and perpendicular lines.

4.  Graph parallel and perpendicular lines from their equations.

4.5  Use reasoning skills

1.       Use logic to make and evaluate mathematical arguments.

 

1.  Use a variety of problem solving skills such as draw a diagram, work backward, and make a systematic list write an equation, use formula to solve nonroutine problems.

2.  Construct logical arguments , form conjectures, judge their validity , and give counterexamples to disprove statements

3.    Construct an if-then statement and test its       validity under a variety of conditions.

4.     Write the converse, inverse, and contrapositive of a conditional statement and determine the truth value of each statement.

5.    Write biconditional statements and recognize good definitions

6.    Define and apply terms associated with mathematical logic and reasoning (e.g. postulate, theorem, hypothesis, conclusion, and converse).

7.    Use inductive reasoning when appropriate to solve a problem situation or write a proof.

8.    Use deductive reasoning when appropriate to solve a problem situation or write a proof.

9.    Use logic to evaluate the validity of a mathematical argument or conclusion.

                                                                                                                                                            

 

Standard 5: Data Analysis, Probability, and Statistics

Students will, interpret, and use tables, charts, and graphs, including scatter plots, multiple broken line graphs, and box-and-whisker plots. Students will interpret and use basic statistical concepts including mean, median, mode, range, and distribution of data, including outliers. Students will make predictions and draw conclusions based on statistical measures and students make predictions based on randomness, chance, equally likely events, and probability. Students will find probabilities based on dependent, independent, and compound events and students make predictions based on randomness, chance, equally likely events, and probability.

 

Content Standard

The student will:

Content Knowledge and Skills:

Benchmarks

5.1  Represent data with a variety of formats.

 

1.  Analyze and interpret tables, charts, and graphs (e.g., scatter plots, line graphs, three-dimensional graphs, and pie charts).

1.  Interpret information presented in tables and charts.

2.  Apply graphs to problem solving.

5.2  Collect, organize, and display data.

1.  Collect and organize data, and display the data in tables, charts, and graphs

1.  Construct a circle graph in order to represent a set of data.

 

5.3  Apply simple statistical measurements.

1.  Interpret and use basic statistical concepts, including mean, median, mode, range, and distribution of data including outliers.

1.  Given a set of data, determine measures of central tendency including mean, median, and mode.

2.  Given a set of data, determine the range.

2.  Make predictions and draw conclusions based on statistical measures.

 

5.4  Understand basic concepts of probability.

1.  Find probabilities based on dependent, independent, and compound events.

1.  Use segment and area models to find the probabilities of events.

 

2.  Contrast experimental and theoretical probabilities.

 

 

5.5  Make predictions or decisions based on data.

1.  Make predictions based on randomness, chance, equally likely events, and probability.

 

 

2.  Use appropriate tools/technology to conduct simulations and employ graphical models to make predictions or decisions based on data.

 

 

3.  Design, conduct, and interpret results of statistical experiments.

 

                                                                                                                                                                                                               

  

Mathematics Vocabulary by RIT Score

 

RIT Scores 211 – 220

 

acute angle

arranged

average

below zero

Celsius

century

centimeters per inch

centuries

combinations

common factor

common multiples

commutative

congruent angle

corresponding parts

counting number

decades

decimal

decimal form

decimal point

degrees

dice

dilation

dividend

enlargement

equivalent

expression

factor tree

fastest

fitted line

fractional part

fractions

gallons

geometric solid

graph

greatest common denominator

highest mean

hour

input

interest

likelihood

line of best fit

line plot

lowest terms

mean

measure of angle

micrometer

minutes

nearest dollar

negative

not prime

number cube

number sequence

obtuse angle

order

ounces

outcome

output

perpendicular

perpendicular line

portion

positive

positive linear relationship

prime factorization

probability

proof

protractor

ray

reciprocal

rectangular prism

rectangular solid

reduce

region

rotation

scatter plot

scientific notation

smaller

smallest

solve

square meter

square numbers

squares

standard form

straight angle

supplementary

symmetrical

systematic list

tails

tenth

three-dimensional

transformation

translation

triangular prism

triple

union

vertex

vertical angle

what shape

yards

 

RIT Scores 221 – 230

absolute value

addends

algebraic sentence

always true

area

arithmetic progression

base

between

chord

circumference

commission

common denominator

compute

cubic feet

cubic inch

cubic meter

cubic millimeter

cubic yard

deducted

depreciate

diameter

discount

divide

equality

equation of a line

equilateral

evaluate

even numbers

expanded notation

experimental probability

exponent

formula

frequency

frequency table

gallons

heaviest

identity element

if – then

integer

intersection

label (units)

least common denominator

less than sum

less than twice

lightest

linear graph

lowest common denominator

lowest terms

magic square

mathematical sentence

matrix

mean

median

metric units

mode

mortality

most

multiply

obtuse angle

odometer

origin

perimeter

Pi

polygon

product

proportion

quadrant

quarts

quotient

radius

radius squared

rate

ratio

real number

reasonable

rectangle

rectangular box

rectangular shape

regression equation

regression line

representative sample

scientific notation

segment BC

shorter

similar

slide

standard numeral

straight angle

survey

table

ten million

ten thousandth

tens digit

theoretical probability

thousandths

trapezoid

RIT Scores 231 – 240

acute triangle

algebraic expression

algebraic sentence

alternate interior angles

amount of sales

arithmetic progression

base

box-and-whiskers plot

car purchase

checking account

chord

columns

commission

coordinates of points

corresponding side

cubed

data point

depreciate

discount

edge

equality

equation of a line

equiangular triangle

fractional part

height

hypotenuse

identity element

if-then statement

inequality

isosceles

linear graph

mathematical sentence

matrix

mean salary

meters per minute

middle

miles per second

minus

negative coefficient

outlier

possibility

prime factor

prime factorization

rectangular house

regression equation

regression line

representative sample

rows

scalene triangle

scientific notation

secant

similar trapezoids

simple interest

solve for n

square numbers

square pyramid

square region

successive

sum of angles in triangle

tangent

tenth power

term in sequence

transformation

translation

tripled

vertex

 

 

RIT Scores 241 – 250

adjacent angle

algebra tiles

alternate exterior angle

alternate interior angle

angle bisector

base ten

circular

complementary angles

congruent triangle

construction

converse

coordinate

correlation

corresponding angles

corresponding parts of congruent triangles

cylindrical tank

decimal

diameter

discount

domain

doubled

endpoints

equilateral pyramid

factor (used with equations)

feet per second

fractions

function table

greatest decrease

hyperbolic

incline

infinite

inscribed

least common multiple

linear foot

linear pair

matrix

midpoint

mileage table

number sequence

opposite

point of intersection

polynomial

prime factors

Pythagorean theorem

quadrupled

radius

rectangular area

rectangular solid

regression equation

sales tax

sample space

semicircle

simultaneous equations

slope of parallel lines

solution set

solution to system

square kilometer

square yard

squared

symmetric

symmetrical halves

system of equations

tangent

time-and-a-half

transversal

tripled

varies inversely as the square

Venn diagram

x-axis

y-axis

y-intercept

 

RIT Scores 251 – 260

adjacent angles

bisect

centroid

circumscribed

collinear

complex

conclusion of if-then statement

conditional

conditional statement

congruent angles

coordinate plane

cosine

counterexample

cross-section area

difference of two squares

discriminant

distance formula

empty set

endpoint

equals 180 degrees

exterior angle

factor completely

geometric series

imaginary solutions

intercepts

interior of angles

isosceles trapezoid

line symmetry

linear

midpoint

nonhorizontal

nonvertical

number of solutions

pair

parabola

perpendicular bisector

point symmetry

quadratic equation

read solution set from graph

reflected

regular hexagon

regular pentagon

relation

right cylinder

right pyramid

rotational symmetry

similar cylinders

similar trapezoids

similar triangles

simultaneous equations

sin A

slant height

slope

solution set

sum of opposites

tangent

undefined

vertical angles

wider

x-coordinate

x-intercept

y-coordinate

 

RIT Scores 261 – 270

 

infinite non-repeating decimal

Postulate

Compound Interest

Semi-annual

Trigonometric function

Trigonometric relationship

Opposite side

Decagon

Adjacent side

Non-repeating decimal

Rational number

Repeating

Repeating decimal

 

RIT Scores > 270

HL

rate of interest

successive discounts

bisector