Step-by-step explanation:
Given that [tex]ABC[/tex] is isosceles triangle.
A isosceles has two sides equal an the third side is the base.
So,[tex]AB=BC[/tex] ...(i)
Given that length of the base [tex]AC=24[/tex]
Given that the perimeter of the triangle is [tex]96[/tex]
So,[tex]AB+BC+AC=96[/tex] ...(ii)
Using (i) and (ii),
[tex]AB+AB+AC=96\\2AB+24=96\\2AB=72\\AB=36cm[/tex]