algorithm

a set of rules for solving a math problem with a given number of steps.

absolute value

a number's distance from zeo on the number line.

acute angle

An angle less than 90 degrees.

angle

the figure formed by two rays or line segments that have a common vertex. Angles are measured in degrees.

angle sum

the sum of all the measurements of all the interor angles of a polygon

change

to become different.

coordinate graph

a graphical representation of pairs of related numerical values that show the relationship between the independant variable (X-AXIS) and the dependant variable.(Y-AXIS)

coordinate pair

an ordered pair of numbers used to locate a point on a coordinate grid.

central angle

an angle with its vertex at the center of a circle

discount

to find the discount, you must find 20% OF 25%.

dependant variable

the variable that relies on the independant variable.

degree

a unit of measure of angles is also equal to 1/360 of a complete circle.

diagonal

a straight line connecting any two vertices of a polygon that are not adjacent.

expanded form

writing an expression as long as the (long way) sum of multiple terms.

equation

a mathematic statement that two expressions are equal.

equation, formula

are rules containing variables that represent a mathematical relationship

equilateral triangle

a triangle with three equal sides

exterior angle

an angle at a vertex of a polygon where the sides of the angle are on one side of the polygon and the extension on the other side.

factored form

writing an expression as (short way) the product of factors.

integers

Whole numbers and their opposites

independant variable

one of the two varables in a relationship. its value determines the value of the other variable called the dependant vaiable.

interior angle

the angle inside two adjacent sides of a polygon

irregular polygon

A polygon with sides that are not all congruent or angles that are not all congruent

isosceles triangle

a triangle with two equal sides

line of symmetry

A line such that if a shape is folded over this line the two halves of the shape match exactly.

line segment

part of a line with two endpoints

midpoint

a point that divides a segment into two congruent segments

negative numbers

Numbers less than zero on the number line

opposite numbers

Numbers that are the same distance from zero in the opposite direction (-3 and 3)

obtuse angle

an angle that measures more than 90 degrees but less than 180 degrees

positive numbers

numbers greater than zero on the number line

pattern

a change that occurs a predictable way.

parellel lines

lines that never touch

parallelogram

a quadrilateral with two pairs of parallel sides

perpendicular lines

intersecting at or forming right angles

polygon

a shape formed by line segments, called sides, so that each of the segments meet exactly two other segments.

quadrilateral

a four-sided polygon

reciprocal

the inverse of a number or fraction.

rational numbers

All positive and negative integers, fractions and decimal numbers.

relationship

an association between two or more variables.

ray

a straight line extending from a point

rectangle

a parallelogram with four right angles

reflection symmetry

a figure has reflection symmetry if it coincides exactly with its reflection image across the axis of symmetry.

regular polygon

a polygon with all sides and all angles equal

rhombus

a quadrilateral with four congruent sides

right angle

an angle that measures 90 degrees

right triangle

Has one right angle and two acute ones.

rotation symmetry

A shape has rotation symmetry if it can be rotated less than a full turn about its center point to a position where it looks exactly as it did before it was rotated.

rule

a summary of a predictable relationship that tells how to find a value of a variable.

sale price

the regular price of an item minus the discount

scale

a labeling scheme used on each of the axis's on a coordinate grid.

scalene triangle

a triangle with no equal sides

side

see polygon

square

having four equal sides and four right angles or forming a right angle

strait angle

an angle with a measure equal to 180 degrees

table

a list of values for two or more variables that shows the relationship between them.

tiling

(also called tessellation) a repeating pattern of plane figures that completely cover a plane with no gaps or overlaps

transversal

a line that intersects two or more lines at different points

trapezoid

A quadrilateral with one pair of parallel sides

variable

a quantity that can change

vertex

point of a polygon

x-axis

the number line that is horizontal on a grid

y-axis

the number line that is vertical on a grid