Equilateral triangles have three congruent sides. That's the definition of an equilateral triangle. If it doesn't have three congruent sides, then it's not an equilateral triangle.
Its not a triangle if it has only two sides.
No TRIangle can have two equal sides it would be an angle. A triangle with 2 equal sides is called an isosceles triangle.
An isoceles triangle has two sides of equal length.
No, not in general. Only a right triangle has two sides which are perpendicular.
An acute triangle may have three, two, or no congruent sides.
If only two sides of a triangle are the same length it is an isosceles triangle. If all three sides are the same length it is an equilateral triangle.
note: TRIangle. a TRIangle always has 3 sides. not 2. THREE
It is impossible two have a triangle that only has two sides. By definition a triangle is a shape that has three sides.
If the base of a triangle is 12, then the other two sides can be any length at all, just as long as they add up to more than 12. If they're congruent, then each one can be anything at all more than 6.
Isosceles triangle.
Isosceles Triangle :)