the side of a triangle are 7cm 9cm and 14cm find its area
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Sol: Sides of the triangle, a = 20 cm, b = 21 cm , c = 29 cm. S = (a + b + c) / 2 = (20 + 21 + 29) / 2 = 35. Area of the triangle = √[s(s-a)(s-b)(s-c )] = √[35(35-20)(35-21)(35-29)]
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