G8

Copyright © Swun Math Grade 8 Cumulative Glossary TE

Term Definition Example Unit

cone a three-dimensional figure

with a circular base connected

to a point with a curved side

11

congruent

figures

figures with exactly the same

shape and same size

∆ ABC ≅ ∆PQR

9

constant a number on its own in an

expression or equation

2 a + 5; 5 is the constant

4

converse of the

Pythagorean

Theorem

if a^2 + b^2 = c^2 , then the triangle

is a right triangle

If a^2 + b^2 < c^2 , then the triangle is obtuse.

If a^2 + b^2 > c^2 , then the triangle is acute.

5

coordinates a pair of numbers used to

locate a point on a coordinate

plane: written in order of x

(horizontal value), y (vertical

value); also called an ordered

pair

(x, y) 6

corresponding

angles

matching angles in similar

figures; are congruent

In transversals, corresponding

angles are in matching corners

9, 10

corresponding

sides

matching sides in similar

figures; are proportional

AC ≅ PR

9, 10

Grade 8 • Glossary