Answer
$$A=7.5sa$$
Work Step by Step
For a regular polygon:
$$ A = \frac{1}{2} a P$$
Thus, the area of the shaded area is:
$$ A = \frac{1}{2}(10s)(2a)- \frac{1}{2} a (5s) \\ A=7.5sa$$
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 8 - Section 8.3 - Regular Polygons and Area - Exercises - Page 377: 32
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
