Elementary Geometry for College Students (6th Edition)

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

Chapter 8 - Review Exercises - Page 385: 6



Work Step by Step

h$^2$=AB$^2$-(.5(AD-BC))$^2$ h$^2$=25-9 h$^2$=16 h=4 A=.5h(AD+BC) A=.5(4)(18) A=36
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