Question

find the area of the following triangle a is equal to 5cm ,b is equal to 4cm,c is equal to 8cm​

Answer 1

using herons formula

A = √s(s-a) (s-b) (s-c)

s =a+b+c÷2

= 5+4+8÷2

=17/2

A=√17/2 (17/2-5) (17/2-4) (17/2-8)

A= √17/2 (17-10÷2) (17-8÷2) (17-16÷2)

A= √17/2 (7/2×9/2× 1/2)

A= √17/2×63/8

A= √1071/16

A= 1/4 √1071

A= 1/4×32.71

A=8.17sq.cm