Question

The unequal side of an isosceles triangle is 6cm and its perimeter is 30cm.Find the area of a triangle using Heron's formula.

Answer 1

Step-by-step explanation:

let the other two equal sides be 2x

a=6cm

Perimeter = a+b+c

24cm = 6+2x

24-6=2x

18=2x

18/2=x

9=x

Semi perimeter= a+b+c/2

= 24/2

=12cm

By Heron's formula

Area =√S(S-a)(S-b)(S-c)

Area= √12(12-6)(12-9)(12-9)

Area= √12(6)(3)(3)

Area= √12(54)

Area= √648

Area =18√2 cm sq

hope its helpful

mark it brainliest