###
percent

a ratio that compares a number to 100

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gratuity

a tip due to how good a waiter was

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commission

earning based on the amount of total sales

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sales tax

an additional percent on the total price

###
unit rate

how much for one unit

###
dilation

a transformation which reduces or increases the size of the original

###
scale factor

The number of times larger or smaller the image is from the original. 1) If a scale is greater than one the image will be larger. 2) If the scale factor is between 0 and 1 the image will get smaller.

###
right triangle

90 degree angle

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acute angle

an angle less than 90 degrees but more than 0 degrees

###
obtuse angle

an angle greater than 90 degrees but less than 180 degrees

###
straight angle

an angle that is 180 degrees

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linear pair

two angles that for a straight angle are called a linear pair

###
supplementary angles

two angles that add up to 180 degrees

###
complementary angles

two angles that add up to 90 degrees

###
vertical angles

opposite angles that are always congruent

###
parallel lines

lines that go on forever and that will never intersect

###
transversal

a line that intersects two or more lines

###
corresponding angles

two angles that are in the same place or location on parallel lines cut by a transversal. They are congruent.

###
alternate

on the opposite sides of a transversal

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interior

in between to two parallel lines

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exterior

outside the parallel lines

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alternate exterior angles

are congruent

###
alternate interior angles

are congruent

###
term

A number or variable or a number with a variable or variables attached by multiplication. For example 3xyz or 5 or n.

###
monomial

an expression with exactly one term For example 3x or a or b or xy or 7x^3y^7d^3

###
binomial

an expression with exactly two terms For example 6j^2 +2j^3.

###
trinomial

an expression with three terms. For example 3x+ 3y+3z.

###
distributive property

multiply the term in the front of the parenthesis by each term inside the parenthesis

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