Mandart Inellipse: Geometry, Triangle, Inconic, Parameters, Mittenpunkt

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

Apex (geometry): Geometry, Triangle, Isosceles, Pyramid (geometry)

Cupola (geometry): Geometry, Polygon, Equilateral Triangle

Symmedian: Geometry, Straight Line, Triangle (Geometry), Median (Geometry)