Problem: calculate the area of a triangle , if the sides of are 39 cm , 36 cm and 15 cm , what is its area ?
Rationale: "the triangle with sides 39 cm , 36 cm and 15 is right angled , where the hypotenuse is 39 cm . area of the triangle = 1 / 2 * 36 * 15 = 270 cm 2 answer : e"
annotated_formula: multiply(divide(36, const_2), 15)