acute angle

An angle less than 90 degrees

obtuse angle

An angle more than 90 degrees

integers

All whole numbers (both positive and negative) and zero.

supplementary angles

two angles that add up to 180 degrees

complimentary angles

angles that add up to 90 degrees

equilateral

having all sides or faces equal

adjacent

having a common boundary or edge

x-axis

the horizontal number line in a coordinate plane

reciprocal

the flipside of a fraction: the reciprocal of 2/3 is 3/2

double

a number times 2

equation

a number sentence

PEMDAS/order of operations

the correct order in which to solve an equation: working left to right repeatedly: Parentheses, Exponents; then Multiplication or Division; then Addition or Subtraction.

y-axis

the vertical axis on a coordinate plane

ordered pair

A pair of numbers that can be used to locate a point on a coordinate plane

equivalent

equal

prime number

a number that can not be divided by anything but 1 and itself

composite number

a number that can be divided into equal parts; opposite of prime number

circumference

The distance around a circle

similar figures

figures that have the same shape but not necessarily the same size

square root

a number that is multiplied by itself to form a product; the inverse of squaring a number

improper fraction

a fraction whose numerator is larger than the denominator

mixed number

a number made up of a whole number and a fraction

quadrilateral

a four-sided polygon

quadrant

one of four sections of the coordinate plane

simplest form

the form of a fraction when the numerator and denominator have no common factor other than 1

simplify

To change an equation, fraction, or other mathematical expression into its most basic form

variable

a symbol (like x or y) that is used in math to represent a number

percent of change

the amount that a number increases or decreases (changes) stated as a percent

surface area

the sum of the areas of all the faces of a solid (3-dimensional) figure

trapezoid

A quadrilateral with only one pair of parallel sides

proportions

two ratios (fractions) that are equal

diameter

the distance across a circle through its center

radius

The distance from the center of a circle to a point on the circle; half of the diameter

bar graph

a graph that uses horizontal or vertical bars to display data

prism

a solid figure with two parallel, congruent bases

line segment

a part of a line with two endpoints

ray

a part of a line that starts at one endpoint and extends forever

stem and leaf plot

a display of data in which digits with larger place values are "stems" and digits with smaller place values are "leaves"

tree diagram

A diagram used to show the total number of possible outcomes

rational numbers

any number (positive or negative) that can be written as a fraction

expression

the part of a number sentence that combines numbers and operations, but doesn't have an equal sign.

greatest common factor (GCF)

The largest factor that two or more numbers have in common (ex. GCF of 200 and 60 is 20)

prime factorization

breaking down an integer into factors until all the factors are prime

scale model

a model used to represent an object that is too large or too small to be built at actual size

vertex

A point where two or more straight lines meet.

diagonal

a straight line through a figure from one corner to another corner; slanted

horizontal

Going straight across from side to side

vertical

Straight up and down

pi

3.14

box and whisker plot

A graph that displays the highest and lowest quarters of data as whiskers, the middle two quarters of the data as a box, and the median

ascending

sorting from smallest to largest; going up

descending

sorting from largest to smallest; going down