Elementary Geometry for College Students (5th Edition)

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

Chapter 1 - Section 1.7 - The Formal Proof of a Theorem - Exercises - Page 53: 15

Answer

See the picture below:

Work Step by Step

Given: $f$ and $g$ intersect. ($f\nparallel g$) Prove: $\angle ACB \cong \angle ECD$ (The same for $\angle ACE$ and $\angle BCD$)
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.