A half-sphere, also known as a hemisphere, has no vertices.
According to the provided reference: "A hemisphere has no vertices. A hemisphere has 1 edge. A hemisphere is half of a sphere."
In geometry, a vertex (plural: vertices) is a point where two or more curves, lines, or edges meet. A sphere is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball. A hemisphere, being half of a sphere, retains the smooth, curved surface and lacks any sharp corners or points that would qualify as vertices. The circular base of the hemisphere forms a single edge, but no vertices.
| Feature | Hemisphere |
|---|---|
| Vertices | 0 |
| Edges | 1 |
| Definition | Half a sphere |
