# leanderisd 8th math - Prerequisite/Support Words

## 21 terms

### area

the number of square units covering a surface of a figure

### circumference

the distance around a circle or its perimeter

### coefficient

the number in front of the variable indicating multiplication (example: the 8 in 8x)

### constant

a term that does not contain a variable (In 3x + 4, the 4 is a constant)

### diameter

the distance across a circle through its center

### difference

the solution to a subtraction problem

### evaluate

to calculate the answer to an expression or equation

### mean

the mathematical average of the data:found by finding the sum of all the data and dividing it by the number of data pieces

### median

the middle number when data is arranged in numerical order

### mode

the number most represented in a set of data

### origin

the point (0,0) in a coordinate plane where the x-axis and the y-axis intersect

### perfect square

the product of two identical whole numbers; its square root is a whole number

### perimeter

the distance around a geometric figure or the sum of all its sides

### product

the solution to a multiplication problem

### quotient

the solution to a division problem

the distance from the center of the circle to the edge

### range

difference between the greatest and least pieces of data

### reasonableness

showing reason or sound judgment; a "sensible choice"

### sum

the solution to an addition problem

### Venn diagram

overlapping circles used to organize data into categories where some information may overlap