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Radda [10]
3 years ago
8

Find the area of this triangle. Round to the nearest tenth

Mathematics
1 answer:
nika2105 [10]3 years ago
4 0

Answer: 141.12 in²

Step-by-step explanation:

Separate into two triangles where the height extends from the 147 degree angle to the 28.8 in side.

cos57 = A/18

A = 9.8 in

Plug into the following formula:

\frac{1}{2}bh = \frac{1}{2}(28.8)(9.8) = 141.12 in²

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