A triangle has sides A, B, and C. Sides A and B have lengths of 2 and 9, respectively. The angle between A and C is (5pi)/24 and the angle between B and C is (7pi)/24. What is the area of the triangle?
1 Answer
Feb 15, 2016
9 square units
Explanation:
The sum of the 3 angles in a triangle
= pi the 2 angles here
= (5pi)/24 + (7pi)/24 = pi/2 which means that the 3rd angle
= pi-pi/2 = pi/2 hence this is a right triangle , with C , the hypotenuse.
so area
= 1/2 xx A xx B = 1/2 xx 2 xx 9 = " 9 square units"
