8
A 3d rectangle, or a cuboid, has eight corners.
No corners and two edges !
A 3D star is not a standard shape. You can easily add another point.
If it is a polyhedron, then four or more faces and four or more corners.
It has 6 faces, 12 edges and 8 corners or vertices
A 3d rectangle, or a cuboid, has eight corners.
No corners and two edges !
A square has 4 corners.
There are four corners on a square.
It has 4 corners
There are 4 corners in a flat rectangle and 8 corners in a 3d rectangle(rectangular prism).Four.
It is a square base pyramid
I just want to say that no 3D shape has corners, they have vertices (singular vertex), which is what you might call a corner, but this is the correct terminology.A sphere has no corners (as it is 3D), but it also has no vertices.
It has 4 corners
A 3D star is not a standard shape. You can easily add another point.
If it is a polyhedron, then four or more faces and four or more corners.
About 26 sides, and 24 corners.