Answer
54 degrees
Work Step by Step
The interior angle and exterior angle add to 180 degrees. Thus, it follows:
$$ = 180^{\circ}-72^{\circ} \\ = 108^{\circ}$$
Since P is the bisector of this angle, it follows:
$$ \angle P = 54^{\circ}$$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 2 - Section 2.5 - Convex Polygons - Exercises - Page 116: 50
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