G8

Grade 8

Glossary

Term Definition Example Unit

additive
inverse

a number and its opposite whose sum is 0; also called a zero pair

—3 + 3 = 0 4

adjacent
angles

angles that share a side and vertex; angles don’t overlap

10

algebra tiles tools or drawings used to
represent integers and
variables in expressions and
equations

4

algebraic
expression

an expression using variables, integers and operations; does not have an equal sign

(9n + 1) ÷ 4 4

alternate
exterior
angles

pairs of angles on opposite sides of the transversal, but outside the two lines

10

alternate
interior
angles

pairs of angles on opposite sides of the transversal, but inside the two lines

10

area model a visual model using area to
multiply two quantities

4