Question

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

Answer 1

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