# 7th Grade Module 3

Terminology

New or Recently Introduced Terms

An Expression in Expanded Form (description) (An expression that is written as sums (and/or

differences) of products whose factors are numbers, variables, or variables raised to whole number

powers is said to be in expanded form. A single number, variable, or a single product of numbers and/or variables is also considered to be in expanded form.)

An Expression in Standard Form (description) (An expression that is in expanded form where all liketerms have been collected is said to be in standard form.)

An Expression in Factored Form (middle school description) (An expression that is a product of two or more expressions is said to be in factored form.)

Coefficient of the Term (The number found by multiplying just the numbers in a term together is called the coefficient of the term.)

Circle (Given a point ݐ֠in the plane and a number ݑߠ> 0, the circle with center ݐ֠and radius ݑߠis the

set of all points in the plane that are distance ݑߠfrom the point ݐ֮)

Diameter of a Circle (The diameter of a circle is the length of any segment that passes through the center of a circle whose endpoints lie on the circle. If ݑߠis the radius of a circle, then the diameter is 2ݑ߮)

Circumference (The length around a circle.)

Pi (The number pi, denoted ݜˬ is the value of the ratio given by the circumference to the diameter, that is, ݜˠ= (circumference)/(diameter).)

Circular Region or Disk (Given a point ݐ֠in the plane and a number ݑߠ> 0, the circular region (or disk) with center ݐ֠and radius ݑߠis the set of all points in the plane whose distance from the point ݐ֠is

less than or equal to ݑ߮ The interior of a circle with center ݐ֠and radius ݑߠis the set of all points in the plane whose distance from the point ݐ֠is less than ݑ߮)

Familiar Terms and Symbols

Variable (middle school description)

Numerical Expression (middle school description)

Value of a Numerical Expression

Expression (middle school description)

Linear Expression

Equivalent Expressions

Equation

Number Sentence

True or False Number Sentence

Truth Values of a Number Sentence

Identity

Term

Distribute

Factor

Properties of Operations (distributive, commutative, associative)

Inequality

Figure

Segment Length of a Segment

Measure of an Angle

Adjacent Angles

Vertical Angles

Triangle

Square

Right Rectangular Prism

Cube

Surface of a Prism

Suggested Tools and Representations

Expressions

Area Model

Tape Diagram

Equations and Inequalities

Number Line

Coordinate Plane

Geometric Figures

Protractor

Nets for Three-Dimensional Figures

**Lesson 1**

manila envelopes

**Lesson 10 **

Protractor

**Lesson 16**

metric rulers (each student)

compass (each student)

**Lesson 22**

copies of composite figures

**Lesson 24**

small amount of water

absorbent towel

calculators

**Lesson 25**

rectangle cake pan

square cube like container of same volume

water or rice

gallon milk jugs