A pyramid
Oval
square - cube as circle - sphere
Square is to cube as circle is to sphere....two dimensial compared to three dimensial figures.
If this is an analogy, the answer would be sphere.
The answer to this question is a square. Hope I helped.
a cone has circle at bottom
Neither. A cone is a cone.
A cone has a base that is a circle. The radius of that circle is its radius.
The base of a cone is always a circle. it also can be a ellipse.
round
A circle with a radius equal to the base of the cone. This circle will be tangential to a segment of a circle whose arc is the same length as the circle, and whose radius is the slant height of the cone.