Question

The sides of a triangle are 56 cm, 60 cm and 52 cm long. Then the area of the triangle is

(A) 1322 cm²

(B) 1311 cm²

(C) 1344 cm²

(D) 1392 cm²

Answer 1

(C) 1344 cm²

Explanation:

According to the question,

Sides of a triangle,

a = 56, b = 60, c = 52

s = (a + b + c)/2

⇒ s = (56 + 60 + 52)/2

= 168/2 = 84.

Area of triangle = √s(s-a)(s-b)(s-c)

= √84(84-56)(84-60)(84-52)

= √84×28×24×32

= 1344cm²

Hence, Options C is the correct answer.