In spherical geometry, a finite henagon can be drawn by placing a single vertex anywhere on a great circle this forms a henagonal dihedron, Schläfli symbol, with two hemispherical henagonal faces which share one 360 degree edge and one vertex.
A finite henagon can be drawn by placing a single vertex anywhere on a great circle. This was in spherical geometry. This forms a henagonal dihedron a great circle with two hemispherical henagonal faces. These two hemispherical henagonal faces share one 360 degree edge. These two hemispherical henagonal faces share one vertex. A henagonal dihedron is Schläfli symbol.