An equilateral triangle.
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All sides are equal in length and each inside angle is equal to 60 degrees.
equilateral have all equal sides.scalene have no equal sides.
A sqare two pairs of parallel sides each corner is a right angle and all sides are equal.
A triangle where all three sides are equal is called an equilateral triangle. The sum of all three angles in any triangle is 180 degrees, and since equal sides means equal angles, three equal angles totaling 180 degrees; each angle must be 60 degrees.
A rectangle can have four equal sides if each angle is 90 degrees. This shape is normally called a square.