Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 3 - Section 3.1 - Reference Angle - 3.1 Problem Set - Page 123: 85

Answer

Complement of $ 70^{\circ}$ = $20^{\circ}$ Supplement of $ 70^{\circ}$ = $110^{\circ}$

Work Step by Step

Complement of $ 70^{\circ}$ = $ 90^{\circ} - 70^{\circ}$ = $20^{\circ}$ (As sum of the measures of complementary angles is 90 degrees, we can find 'one' by subtracting 'other' from $90^{\circ}$ ) Supplement of $ 70^{\circ}$ = $ 180^{\circ} - 70^{\circ}$ = $110^{\circ}$ (As sum of the measures of supplementary angles is 180 degrees, we can find 'one' by subtracting 'other' from $180^{\circ}$)
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