Which three-dimensional figure does NOT have a base?
cone
prism
pyramid
sphere
The three-dimensional figure that does NOT have a base is a sphere.
To determine this, you can visualize each figure and analyze their properties.
A cone has a circular base and a curved surface that tapers to a point (apex).
A prism has two parallel bases, which can be any shape, connected by rectangular faces.
A pyramid has a polygonal base and triangular faces converging at a single point (apex).
On the other hand, a sphere does not have a base. It is a perfectly round object with no edges or faces. It is defined by all points equidistant from its center.
Therefore, the figure that does NOT have a base is a sphere.