Equilateral Polygon: Geometry, Polygon, Triangle, Internal Angle

Cupola (geometry): Geometry, Polygon, Equilateral Triangle

Equiangular Polygon: Euclidean Geometry, Polygon, Regular Equilateral Triangle

Hendecagon: Geometry, Polygon, Internal Angle, Constructible Polygon

Equilateral Triangle: Geometry, Triangle (geometry), Euclidean Equiangular Polygon