Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 98: 47


1. The sum of the angles of a triangle is 180 degrees. 2. There are three angles in a triangle. 3. If there were two right angles, then there could be no third angle and a sum of 180 degrees. 4. Thus, for statements (1) and (2) to both be true, there can only be one right angle.
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