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Q: Are isosceles triangle sometimes an equilateral triangle?

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sometimes, but not always

An isosceles triangle is never an equilateral triangle because the former has only 2 equal sides while the latter has 3 equal sides.

It can be scalene or isosceles but not equilateral.

Never but an isosceles triangle can sometimes be a right angle triangle

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

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sometimes, but not always

If you can only prove two sides of an apparently equilateral triangle to be congruent then you have to use isosceles.

Yes, if angles happen to be 60°

An isosceles triangle is never an equilateral triangle because the former has only 2 equal sides while the latter has 3 equal sides.

It can be scalene or isosceles but not equilateral.

The contrapositive would be: If it is not an isosceles triangle then it is not an equilateral triangle.

Never but an isosceles triangle can sometimes be a right angle triangle

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

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

An isosceles triangle is one that has two sides of the same length and one side different An equilateral triangle is one that has all of its sides of equal length. All of the angles on an equilateral triangle are 60 degrees. A triangle with two sides 4cm and one side 100m would be an isosceles. But an equilateral triangle has all of the sides exactly the same so therefore an isosceles triangle can never ever be an equilateral triangle

An equilateral triangle has all sides measuring the same and an isosceles triangle has 2 sides congruent, so they are not the same. Every equilateral triangle is also an isosceles triangle, but not every isosceles triangle is an equilateral triangle. Isosceles = at least two equal sides Equilateral = three equal sides

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.

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