It is the set of points, in 3-dimensional space, defined by the intersection of two planes which define faces of the shape.
cylinder
Spheres
sphere
There are lots of shapes: a sphere, an ellipsoid, a smoothed blob.
cubes and rectangular prisms
3D shapes have edges, sides, and intersecting points
Cylinder
There are infinitely many shapes that do.
cylinder
Spheres
sphere
Cubes, cuboids, Trapezoid prisms, octahedrons
A cube has 6 faces
There are lots of shapes: a sphere, an ellipsoid, a smoothed blob.
none of them. The cube has parallel and perpendicular and os does the cuboid.
They are points where three or more edges meet.
cubes and rectangular prisms