Question

the area of isosceles triangle is 48 cm find the perimeter of the triangle if its an equal side is 12 cm long​

Answer 1

Method 1: Use Heron's Formula

Area = √[s(s-a)(s-b)(s-c)]

where s = (a+b+c)/2

And Perimeter of triangle is equal to Sun of its sides = a + b + c = 2s

Now using Heron's Formula find "s".

Area is given (= 48 cm²), & try sides say a, b are given (a=b=12cm).

Find "C" or "S".

Method 2:
Use Area = 1/2 (base)(height)
Take any of the given equal sides as base(=12cm)
And then find height.
After that use Pythagoras to find the 3rd side (say "c").
Perimeter = ( 12 + 12 + c )cm
= ( 24 + c ) cm

Thankyou!!!