Main Page | See live article | Alphabetical index An equilateral polygon has all sides of the same length. By definition a square is always equilateral (see also rectangle): x x x x x x x x x x x x x x x x This triangle is also equilateral: x x x x x x x x x x x x x x x Any n-sided polygon which has n sides of equal length can be considered an equilateral. Not all equilaterals are convex geometric shapes: consider that for a pentagon two adjacent sides can be reflected in the line segment joining the two extreme vertices. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.