Here is some vocabulary you might see in your math class!

###
acute angle

An angle measuring more than zero degrees and less than 90 degrees

###
congruent

Having the same size and shape

###
difference

The amount that remains after one number has been subtracted from another

###
exponent

A number that tells how many times the base is multiplied by itself

###
reciprocal

The inverse of a fraction; when multiplied by the original fraction, it results in a product that equals one

###
vertex (vertices - plural)

The point of intersection for two sides of a plane figure, three sides of a solid figure, or the endpoints of two rays that form an angle.

###
expression

A combination of numbers and variables connected by one or more operations signs

###
polygon

Three or more line segments in a plane that forms a closed figure. The line segments never cross but meet at their endpoints.

###
product

The result of muliplying two or more numbers

###
range

The difference between the least and greatest values in a set of numbers

###
scalene triangle

A triangle with sides of different lengths and no two angles are the same

###
area

Surface space that is measured in square units

###
perimeter

The distance around a figure

###
circumference

The distance around a circle (the perimeter of a circle)

###
straight angle

An angle that measures 180 degrees

###
obtuse angle

An angle measuring more than 90 degrees and less than 180 degrees

###
complementary angle

Two angles whose sum equals 90 degrees

###
diameter

A line segment that passes through the center of a circle and has its endpoints on the circle

###
sum

The total of two or more numbers being added

###
quotient

The result of dividing one number by another; the solution to a division problem

###
mean

The sum of a group of numbers divided by the number of numbers; also known as the average

###
median

A value found by ordering a group of data from least to greatest and choosing the middle value of the group.

###
mode

In a group of values, the value that occurs most often

###
pyramid

A solid figure that has triangles for its sides and a polygon as its base

###
quadrilateral

A polygon that has four sides

###
parallelogram

a quadrilateral with two pairs of congruent, parallel sides

###
rectangle

A parallelogram with four right angles

###
reflection

A mirror image of a figure shown over a line of reflection

###
scale drawing

A drawing of an object that is different in size (usually smaller than the original) but keeps the same proportions

###
octagon

An eight-sided polygon

###
pentagon

A polygon with five sides

###
percent

The ratio of a number to 100 (per one hundred); the symbol %

###
similar figures

Figures that have the same shape but different sizes; their sides are proportional, while their corresponding angles are equal

###
equilateral triangle

A triangle that has three equal sides and three equal angles

###
radius

A length that is half the diameter of a circle; the distance from the center of the circle to the circle itself

###
isosceles triangle

A triangle with two equal sides and two equal angles

###
right triangle

A triangle with one right angle

###
supplementary angles

Two angles whose sum is 180 degrees

###
order of operations

Rules that tell which steps to follow when solving an expression. PEMDAS

###
rhombus

A parallelogram with all sides equal and congruent. Looks like a diamond or a square that fell over.

###
square root

A number that when multiplied by itself results in the given number.

###
proportion

An equation stating that two ratios are equal

###
simplify

To make a fraction easier to work with by taking out common factors

###
x-axis

The horizontal number line of a coordinate graph

###
y-axis

The vertical number line of a coordinate graph

###
x-coordinate

The value on the x-axis used to locate a point on the coordinate graph. It is the first value in an ordered pair.

###
y-coordinate

The value on the y-axis used to locate a point on the coordinate graph. It is the second value in an ordered pair.

###
ordered pair

Two numbers listed in a specific order; it describes a point on the coordinate graph