# 7th grade Math vocab terms for Exams by Ally :)

## 30 terms

### Absolute Value

the distance from 0 on a number line

### Associative Property

changing the grouping of the numbers doesn't change the answer

### Commutative Property

changing the order of the numbers doesn't change the answer

### Distributive Property

shows how multiplication affects an addition or subtraction problem

### Identity Property

the answer of 0 or 1 is 0 or 1

### Integers

the set of positive whole numbers, their opposites, and 0

### Inverse Property

a number divided by the same number always equals 1

### Variable

a letter that stands for a number

### Rational Number

numbers that can be written as a fraction, terminating decimal, or repeating decimal

### Terminating Decimal

a decimal that stops

### Repeating Decimal

a decimal that repeats the same digits without end

### Base

the number that is used as a factor, when a number is written in exponential form

### Power

a number that can be expressed using a base and an exponent

### Exponent

tells how many times a number, or base, is used as a factor

### Formula

a rule that shows the relationship between two or more quantities

### Irrational number

numbers that can't be written as a fraction, terminating decimal, or repeating decimal

### Pythagorean Theorem

in any right triangle, the sum or the squares of the lengths of the legs is equal to the square of the length of the hypotenuse

### Hypotenuse

in a right triangle, it is the longest side

the x- and y-axes divide the coordinate plane into four regions called this

### X-axis

the horizontal number line that, together with the y-axis, forms the coordinate plane

### Y-axis

is the vertical number line that, together with the x-axis, forms the coordinate plane

### Translation

a transformation that moves each point of a figure the same distance and in the same direction

### Reflection

a transformation that flips a figure over a line of reflection

### Reflectional Symmetry

if a figure can be reflected over a line so that its image matches the original figure, the figure has this

### Rotational Symmetry

a figure has this if it can be rotated 180 degrees or less and match the original figure

### Unit Rate

the rate for one unit of a given quantity

rates equal to 1

### Proportion

an equation stating that two ratios are equal

### Percent

a ratio that compares a number to 100

### Rotation

a transformation that turns a figure about a fixed point