Question

Find the area of an isosceles triangle whose sides are of length 15cm each and the third side is 12cm

Answer 1

Step-by-step explanation:

S=15+15+12/2

S=21

heron's formula=√s(s-a)(s-b)(s-c)

=√21(21-15)(21-15)(21-12)

=√21x6x6x9

=6x3√21

=18√21 cm^2

Answer 2

Step-by-step explanation:

here is ur ans........

you can also write√6804=18√21 cm²