Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - Review Exercises: 30

Answer

The third angle of the triangle is $70˚$.

Work Step by Step

Let $x =$ third angle of the triangle $70 + 40 + x = 180$ (Angles in a triangle add to $180˚$) $110 + x = 180$ $x = 70˚$ Therefore the third angle of the triangle is $70˚$.
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