Question

the perimeter of a triangle is 72 cm with two equal sides of 20 cm. what is the area

Answer 1

perimeter of triangle =a+b+c. so, 20+20+c=72
40+c =72
c=72-40
c=32cm
s=a+b+c/2
=20+20+32
=72/2=36
area of triangle = s×(s-a)(s-b)(s-c)
$s (s - a)(s - b)(s - c) \sqrt{?}$
36 (36-20)(36-20) (36-32) root over
36×16×16×4 root over
48√4