Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 4 - Section 4.1 - Properties of a Parallelogram - Exercises - Page 189: 27


$\angle$P is a right angle.

Work Step by Step

$\angle$H+$\angle$L=180 Therefore, ($\frac{1}{2}$)$\angle$H+($\frac{1}{2}$)$\angle$L=90 If two angles in a triangle are complimentary, then the third angle must be a right angle.
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