An equilateral triangle, by definition, has three sides of equal length.
The definition for an isosceles triangle is that it must have two sides of equal length, the other side being free to have any length.
Based on these two definitions, we can say that an equilateral triangle is a special case of the isosceles triangle, namely one where the third side is also equal to the other two sides.
Chat with our AI personalities
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.