<P> In Euclidean geometry, an equiangular polygon is a polygon whose vertex angles are equal . If the lengths of the sides are also equal (that is, if it is also equilateral) then it is a regular polygon . Isogonal polygons are equiangular polygons which alternate two edge lengths . </P> <P> The only equiangular triangle is the equilateral triangle . Rectangles, including the square, are the only equiangular quadrilaterals (four - sided figures). </P>

A polygon that is equiangular but not equilateral
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