The perimeter of a triangle is 39 cm and the inradius of the triangle is 1.5 cm. What is the area of the triangle?  Pick:
A) 22	B) 35	C) 77	D) 54	E) 29

Rationale: "area of a triangle = r * s where r is the inradius and s is the semi perimeter of the triangle . area of triangle = 1.5 * 39 / 2 = 29 cm 2 answer : e"
Answer: E