Isosceles triangles are triangle with 2 equal sides.
base of the triangle is AC , therefore sides AB and BC are equal
perimeter is sum of all the sides of ABC
formula is
AB + BC + AC = 96 cm
AC = 24 cm
then
AB + BC = 96 - 24
AB + BC = 72 cm
since its an isosceles triangle
AB = BC = x
then
x + x = 72
2x = 72
x = 72/2 = 36 cm
measure of AB = 36 cm
