#### Answer

84 $in^{2}$

#### Work Step by Step

Area of a triangle formula is A=$\frac{1}{2}$bh.
A=$\frac{1}{2}$bh
A=$\frac{1}{2}$(21)(8)
A=84

Published by
Prentice Hall

ISBN 10:
0133281159

ISBN 13:
978-0-13328-115-6

84 $in^{2}$

Area of a triangle formula is A=$\frac{1}{2}$bh.
A=$\frac{1}{2}$bh
A=$\frac{1}{2}$(21)(8)
A=84

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