octagonal prism
That 3D shape is called triangular pyramid.
They are called a Vertices and it is where 2 edges meet.
cube
cube
Triangular prism
A U shaped room has 8 edges on the floor, 8 on the roof and 8 vertical edges, making 24
A 3D shape that has 6 edges is called a hexagonal prism.
octagonal prism
corners of a 3d shape
A pentagonal prism has 15 edges
A cube
A cube
triangular prism
Sphere
Spherical
It has 12 edges and 6 faces