Question

find the area of a polygon with sides 5cm, 6cm ,3cm,2cmm​

Answer 1

Step-by-step explanation:

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