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

Question

asked Mar 4, 2022 195k views

1 Answer

Sarelle · Answer 1 · 2022-03-09T23:33:19+0000

Answer: 141.12 in²

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:

(1)/(2) bh =
(1)/(2) (28.8)(9.8) = 141.12 in²