Find the area of an isosceles triangle each of whose equal sides measures 13cm and whose base measures 20cm.

Find the area of an isosceles triangle each of whose equal sides measures 13cm and whose base measures 20cm.

Let,

a = 13 cm

b = 13 cm

And,

C = 20 cm

Now,

s =

=

= = 23 cm

We know that,

Area of triangle =

=

=

= 10

= 10 × 8.306

= 83.06 cm²

Therefore,

Area of isosceles triangle = 83.06 cm²

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