Are All equilateral triangles are isosceles.?

Answer 1

No because an equilateral triangle has 3 equal sides but an isosceles triangle has only 2 equal sides

Answer 2

An equilateral TRIANGLE is not an isosceles ANGLE. However, all equilateral triangles are isosceles triangles. By definition, an isosceles triangle has at least two sides that are congruent. An equilateral has three sides that are congruent, thus an equilateral triangle is an isosceles triangle.