A U shaped room has 8 edges on the floor, 8 on the roof and 8 vertical edges, making 24
A pentagonal prism has 15 edges
Spherical
pentagon
Sphere
cube
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
A circle
triangular prism
Sphere
Spherical