Let us recall the definition of an isosceles triangle. An isosceles triangle is a triangle with two equal or congruent sides. In this definition, it is not stated that it has exactly two equal sides.
An equilateral triangle has three equal or congruent sides. If it has three equal sides, then it must have two equal sides.
Therefore, an equilateral triangle is considered as an isosceles triangle.
But, an isosceles triangle is not necessarily an equilateral triangle.
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Are isosceles triangle sometimes an equilateral triangle
It can be scalene or isosceles but not equilateral.
An isosceles triangle has at least two congruent sides. An equilateral triangle has three congruent sides. So, an equilateral triangle is a special case of isosceles triangles. Since the equilateral triangle has three congruent sides, it satisfies the conditions of isosceles triangle. So, equilateral triangles are always isosceles triangles. Source: www.icoachmath.com
Not ... exactly. It would be closer to accurate to say that an equilateral triangle is a special case of the isosceles triangle.All equilateral triangles are (also) isosceles; but most isosceles triangles are not equilateral.
Isosceles has 2 equal sides, but an equilateral triangle, all of its sides are equal.