what is the area of an obtuse angled triangle whose two sides are 8 and 12 and the angle included between the two sides is 150 o ?
explanatory answer if two sides of a triangle and the included angle ' y ' is known , then the area of the triangle = 1 / 2 * ( product of sides ) * sin y substituting the values in the formula , we get 1 / 2 * 8 * 12 * sin 150 o = 1 / 2 * 8 * 12 * 1 / 2 . note : sin 150 o = 1 / 2 area = 24 sq units . choice a
subtract(triangle_area(add(multiply(8, divide(sqrt(const_3), const_2)), 12), divide(8, const_2)), triangle_area(divide(8, const_2), multiply(8, divide(sqrt(const_3), const_2))))