Answer
$20\ cm^2$
Work Step by Step
$A=\frac{1}{2}bh\longrightarrow$ formula for area of a triangle
$A=\frac{1}{2}(5)(8)\longrightarrow$ substitute
$A=20\longrightarrow$ simplify
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 2 - Reasoning and Proof - 2-6 Proving Angles Congruent - Practice and Problem-Solving Exercises - Page 127: 37
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