Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 1 - Section 1.2 - Informal Geometry and Measurement - Exercises - Page 18: 28

Answer

$\angle$7 and $\angle$8 are not congruent.

Work Step by Step

In this diagram the measures of angles 7 and 8 are unknown. The two right angles have no measurable relationship to angles 7 and 8. Although all four angles will equal 360$^{\circ}$, you still don't know the measures of angles 7 and 8.
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