What is the area of a triangular roof whose shorter lengths are 20 feet and 30 feet, when the angle between these lengths is 35º? Round your answer to the nearest tenth of a square foot.

A. 172.1 square feet
B. 171.0 square feet
C. 171.2 square feet
D. 170.2 square feet

Question

What is the area of a triangular roof whose shorter lengths are 20 feet and 30 feet, when the angle between these lengths is 35º?  Round your answer to the nearest tenth of a square foot.

A. 172.1 square feet
B.  171.0 square feet
C.  171.2 square feet
D.  170.2 square feet

anonymous · Answer

Area of ANY triangle = half(product of any 2 sides X sine of the angle between them)
                              =(20X 30 X sin35)divided by 2
                              = (600 x 0.5736) divided by 2
                              =172.1

                              =