Question

the base of an isosceles triangle is 30cm and area is 120cm. find its perimeter​

Answer 1

area = 1/2* b *h

120 = 1/2 * 30*h

120 = 15h

h = 120/15

h 8cm

perimeter = 2*8 + 30

= 16 + 30 = 46cm