G8

Copyright © Swun Math Grade 8 Cumulative Glossary TE

Grade 8 • Glossary

Term Definition Example Unit

rational

solution

solutions to equations that are

integers or fractions yy= → = =

229 2 29 3 2

real numbers the set of numbers that

includes both rational and

irrational numbers

½ , 1

reciprocal what to multiply a value by to

get 1; multiplicative inverse

4 —^5 is the reciprocal of 4^5 2

reflection (^) a flip; a transformation across a
line creating a mirror image
9
relation a set of input and output values,
usually represented by ordered
pairs
{(1, 2), (3, 6), (5, 10)} 7
relative
frequency
the number of times a result
happens divided by all possible
results
12
repeating
decimal
a decimal number that has
digits that repeat indefinitely;
the repeating digit is marked
with a bar notation
0.444 =
4
= 04.
9
1
right triangle A triangle with one right angle
(90°) and two acute angles
5
rotation a turn; a figure rotated clockwise
or counterclockwise around an
angle or center point
9