Question

Two equal sides of an isosceles triangle is 13 cm, and the area is 60 cm 2 . find the perimeterof the triangle ?

Answer 1

two sides of isosceles ∆ is (a)= 13 cm
Area=60 cm2
find length of base(b):-
using formula,

Area=(b/4)×√(4a^2 - b^2)

then use perimeter formula,
P=perimeter

P=2a+b