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Polygons

All four sides and angles are congruent.
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All three sides and angles are congruent.
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A regular nonagon with all diagonals present
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A regular dodecagon with all its diagonals
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The arc length is a fraction of the circumference.
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Each angle is equal to 120 degrees; all sides are congruent.
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Regular polygons are equilateral and equiangular.
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Geometry Expressions