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 8 - Section 8.1 - Area and Initial Postulates - Exercises - Page 360: 40b


84 $cm^{2}$

Work Step by Step

The area of triangle whose base has length b and whose corresponding altitude has length h is given by A = $\frac{1}{2}$ bh In triangle ABC base b= 21 cm Height h = 8 cm. A =$\frac{1}{2}$ bh = $\frac{1}{2}$* 21 * 8 = 84 $cm^{2}$
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