The terms equiangular means a polygon having the same angle between any two adjacent sides. Equilateral means all sides of equal length. A polygon can be equilateral without being equiangular (the rhombus) and equiangular without being equilateral (the rectangle).
If a polygon is both equilateral and equiangular, it is a "regular polygon" such as the pentagon, square, and equilateral triangle.
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Equilateral: the sides are the same size.
Equiangular: the angles are the same size.
No, an equilateral triangle has to be equiangular, but an equiangular triangle does NOT have to be equilateral
Regular shapes are both equilateral and equiangular. Irregular shapes may or may not be equilateral and equiangular.
A rectangle is not always equilateral, although it is always equiangular. A rhombus is not always equiangular, but is always equilateral. A square is both equilateral and equiangular.
Any polygon that's equilateral must be equiangular.
Every equilateral triangle is equiangular, and every equiangular triangle is equilateral.