A triangle has sides A, B, and C. Sides A and B have lengths of 5 and 8, respectively. The angle between A and C is (13pi)/24 and the angle between B and C is (3pi)/8. What is the area of the triangle?

1 Answer
Mar 27, 2018

A_t = (1/2) * a * b * sin C = 5.18 " sq units"

Explanation:

hat B = (13pi)/24, hat A = (3pi) / 8, a = 5, b = 8

To find the area of the triangle.

hat C = pi - hat A - hat B = pi - (3pi) / 8 - (13pi) / 24 = pi/12

"Area of triangle " = A_t = (1/2) * a * b * sin C

A_t = (1/2) * 5 * 8 * sin (pi/12) = 5.18 " sq units"