Answer
20 $unit^{2}$
Work Step by Step
The area of any quadrilateral with perpendicular diagonals of length d1 and d2 is given by
A =$\frac{1}{2}$ d1 * d2
d1 = AC= 8
d2 = BD = 5
The area of ABCD = \frac{1}{2}$ *8* 5 = 20 $unit^{2}$
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 8.2 - Perimeter and Area of Polygons - Exercises - Page 370: 15
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