Elementary Geometry for College Students (5th Edition)

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

Chapter 5 - Section 5.3 - Proving Lines Parallel - Exercises - Page 243: 39

Answer

The proof is in the following form: Column 1 of proof; Column 2 of proof. Thus, we have: 1. The altitude of a right triangle is orthogonal to the base; this is the definition of an altitude. 2. The right angles are congruent; right angles are always congruent to each other 3. The angle shared by both triangles is congruent; identity property. 4. Thus, the two right triangles are similar; AA
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