Perimeter of an isosceles triangle is 40 cm and its equal sides is 15 cm . find the area of the triangle using herons formula
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The third side is (40-(15+15))= 10 cm.
Therefore using Heron's formula
(root of) s(s-a)(s-b)(s-c)
where s = a+b+c/2
15+15+10/2 = 40/2 = 20.
(root of) 20 x 5 x 5 x 10.
(root of) 5000 sq cm.
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