if the sides of a triangle are 4 cm , 9 cm and 13 cm , what is its area ?
"the triangle with sides 4 cm , 9 cm and 13 cm is right angled , where the hypotenuse is 13 cm . area of the triangle = 1 / 2 * 4 * 9 = 18 cm 2 answer : option a"
divide(multiply(9, 13), const_2)