Has Two Circular Bases That Are Congruent and Parallel?

A cylinder is a three-dimensional solid consisting of two congruent, parallel, circular sides (the bases), joined by a curved surface. You could also think of a cylinder as a “circular prism”.

Which of the following object has two circular bases?

A cylinder has two bases that are circles.

What is a circular base?

: the circle of an involute gear wheel from which the involute forming the outline of the tooth face is generated.