## 30 terms

### 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.

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

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

are congruent

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