the bottom and supporting part of the shape
If you include the base as a side (you should) then the answer is no. If you don't then you can have a tetrahedron. The name implies a solid shape with four (tetra-) sides so the base really should be counted.
Military bases employed MANY people. When the cold war ended in 1990, base closures put MANY people out of work.
it can be any shape
A pyramid has a pointy top and it is a 3D shape.
The Parthenon is rectangular in shape.
the shape of the base of a rectangular pyramid is a rectangle.
The bottom line of a shape is the base of the shape. For example, the bottom line of a pyramid is the base of the pyramid.
The shape of each base of a cylinder is circle. Also, the base of it can be a pair of congruent or parallel.
Their base shape. For example a rectangular prism has base that is a rectangle. Guess what kind of base shape a triangular prism has? yes, triangle.
Its a Pentagon.
it is the shape of a star
a square * * * * * That would be a square pyramid! A triangular pyramid would have ... wait for it ... a TRIANGULAR base! Worth waiting for, wasn't it?
A rhombus has no base. It is flat.
The bottom or (Base) of a shape. Example...
The hexagon is the base.
The base of a cuboid is a rectangle.
You find the length and height of the shape, them you find the volume