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Space Race
Defend Earth from alien invaders
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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