Question

If ∆abc and ∆xyz are equilateral triangle and ab=xy, the condition under which ∆abc=∆xyz is ?

Answer 1

then they are congruent

Answer 2

we know that all side of equilateral triangle are equal.
AB=XY
BC=YZ
CA=ZX
so ∆abc congurent to ∆xyz
so ∆abc=∆xyz