If the sides of a triangle are 30 cm, 28 cm and 12 cm, what is its area?  Choose one
A) 120 cm 2 B) 112 cm 2 C) 776 cm 2 D) 666 cm 2 E) 168 cm 2

Rationale: "the triangle with sides 30 cm , 28 cm and 12 cm is right angled , where the hypotenuse is 30 cm . area of the triangle = 1 / 2 * 28 * 12 = 168 cm 2 answer : e"
Answer: E