8th grade math vocabulary

30 terms by yraj20

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percent

a ratio that compares a number to 100

gratuity

a tip due to how good a waiter was

commission

earning based on the amount of total sales

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

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

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

congruent

equivalent

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.

~=

sign for congruent

alternate

on the opposite sides of a transversal

interior

in between to two parallel lines

exterior

outside the parallel lines

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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