Question

Find the area of polygon whose side are 6cm 2cm 5cm 3cm

Answer 1

Let the sides be a = 3, b = 5, c = 6

First calculate the semiperimeter; s = (3 +5 +6)/2 = 7

Then calculate s - a = 4, s - b = 2, s - c = 1

Then according to Heron’s formula;

Area = Sqrt(s(s -a)(s - b)(s - c)) = Sqrt(7*4*2*1) = Sqrt(56) =| 7.48 cm^2


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