It depends on the shape. A cube has 8 of them, a square pyramid has 5,
and a sphere doesn't hasve any vertices at all.
In two dimensions, all sorts of triangles. In 3 or more dimensions there is no specific name for shapes with three vertices.
2-dimensional shapes, with three straight sides have three vertices.
A rhombus is a two dimensional figure while the concept of {faces, vertices and edges} is relevant to 3-dimensional shapes.
Shapes that have fewer than 5 vertices include triangles (3 vertices), quadrilaterals such as squares and rectangles (4 vertices), and circles (0 vertices, as it is defined by its center point). These shapes are classified based on the number of corners or points that define their boundaries. Shapes with fewer vertices are typically simpler in structure and have fewer sides.
Most 2 dimensional shapes (all polygons) have 3 or more vertices. Most 3-dimensional shapes (polyhedra) have 4 or more vertices.
There are many shapes that have fewer than 3 vertices like the circle, hyperbola, semi circle, and many others. However if you are only talking about polygons then there is no actual shape with fewer than 3 vertices that you can find in a real life situation but they do have names for these shapes. A 2-sided polygon is known as a digon. A 1-sided polygon is known as a monogon. These shapes only exist in theory however and not in real life.
cube 8
In 3 dimensions, a sphere, an ellipsoid, or a blob.
Yes. A sphere, an ellipsoid, a toroid.
In 2 dimensions, a quadrilateral. In 3 dimensions, a tetrahedron.
A triangle is the only polygon with 3 corners (vertices). There is no polyhedron with 3 corners.
3 vertices