Geometry: Common Core (15th Edition)

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


$20\ cm^2$

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
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