Strictly speaking, any 3d figure with anything besides 6 sides cannot consist of rectangles. However, the name for an 8-sided figure is "octahedron".
triangular pyramid
A cuboid.
A cube
Cuboid
,kmjui
cuboid
A rectangular prism.
Not any geometric figure.
A tetrahedron.
A hexahedron, or cube.
Strictly speaking, any 3d figure with anything besides 6 sides cannot consist of rectangles. However, the name for an 8-sided figure is "octahedron".
triangular pyramid
A cuboid.
A cube
A rectangular cuboid would fit the given description
6 faces