Question

All equilateral triangles are isosceles but not all isosceles triangles are equilateral. Why?

Answer 1

Answer:

It's because in equilateral triangle, all sides are equal which satisfies with isosceles triangle whose two of its sides are equal.

This is not possible in the other case

Answer 2

because in isosceles triangle two side and two angle must be same

but in equilateral triangle all the side and angle are same

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