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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 |
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Answer» (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. |
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