An equilateral triangle has all sides the same length and all its angles are 60dgrees. A right angled triangle is just a triangle with a right angle.
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Interestingly, no. . .
An isoceles triangle has TWO sides of equal length but an equilateral triangle has THREE sides of equal length
isoseles triangle is 2 sides are equal but equilateral is all sides are equal
An equilateral triangle has all sides equal and an isosceles has only two sides equal.
An equilateral triangle is a triangle with three equal sides. An isosceles triangle is one with two equal sides. So yes, an equilateral triangle qualifies as being an isosceles triangle as well. This is quite similar to the relationship between squares and rectangles, where a square is always a rectangle, but a rectangle isn't necessarily a square.