An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find the area of the triangle.

Question

Philoid · Accepted Answer

Length of equal sides of the triangle = 12cm

Parameter of the triangle = 30 cm

Third side of triangle = 30 – (12 + 12)

= 6cm

Semi perimeter of triangle(s) =

= 15cm

Now,

Using Heron’s formula,

Area of the triangle =

=

= cm²

Hence, the area of triangle is cm²