Question

find the area of a isosclecs triangle with two equal sides as 5cm each and third sides as 8 xm

Answer 1

Step-by-step explanation:

perimeter of the triangle is 18 cm.

semi perimeter is 9 cm.

we can find the area of the triangle through Heron's formula.

$\sqrt{s{s - a}{s - b}{s - c}$

=√9*4*4*1=12 cm²

....

Answer 2

Answer:

12 cm^2

Step-by-step explanation:

There is a separate formula for finding the areas of these triangles. But here we are using heron's formula:

  Semi perimeter =  perimeter / 2  = ( 5 + 5 + 8 ) / 2 cm

   Semi perimeter = 9 cm

Now,  area is given by :

⇒ √{ 9 * ( 9 - 8 )( 9 - 5 )( 9 - 5 ) } cm^2

⇒ √{ 9 * 1 * 4 * 4 } cm^2

⇒ 3 * 4 cm^2

⇒ 12 cm^2