8th STAAR Math Vocabulary

irrational number

• a number that can be expressed as a ratio @@\frac{a}{b}@@

• a number that has a square root symbol

• a number that cannot be written as a ratio @@\frac{a}{b}@@, usually has a square root symbol

• a whole number that is not a fraction

proportional

• crosses through (0,0) and ratios are equal

• is a term used for linear equations only

• is a type of non-linear relationship

• involves only positive numbers

function

• a relation where x is paired with only one y

• a relation where x can be paired with multiple y

• a random set of numbers

• a sequence of operations

non-proportional

• doesn't cross through (0,0) and ratios are not equal

• crosses through (0,0) and ratios are equal

• has a constant rate of change

• is a linear relationship

lateral surface area

• the area of the faces that does not include the base of a 3D shape

• the total area of all faces of a 3D shape

• the area of the base of a 3D shape

• the area of the edges of a 3D shape

scale factor

• how much an image got bigger or smaller

• the ratio of the new size to the old size

• the total area of the image

• the color change in the image

variable

• a letter that represents a number

• a fixed value that does not change

• a type of data structure

• a function that returns a value

interest

• extra money or cost added to the principal in a loan or investment usually given as a percentage of the principal amount

• a fee charged for the use of borrowed money

• the total amount of money paid back on a loan

• a type of investment that guarantees returns

diameter

• distance from one end to the other end of circle through the center

• the distance around the circle

• the area of the circle

• the radius of the circle

pythagorean theorem

• a formula to find the missing side of a right triangle

• a method to calculate the area of a triangle

• a rule for finding the perimeter of a triangle

• a theorem related to the angles of a triangle