3 years ago

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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