Problem: if the sides of a triangle are 31 cm , 29 cm and 15 cm , what is its area ?
Rationale: "the triangle with sides 31 cm , 29 cm and 15 cm is right angled , where the hypotenuse is 31 cm . area of the triangle = 1 / 2 * 29 * 15 = 217.5 cm 2 answer : e"
annotated_formula: divide(multiply(29, 15), const_2)