← Math Terms Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All Radius Distance from the center to any point on a circle. Diameter The distance from one side of the circle to the other through the center. Cylinder Three dimensional figure with two circular bases that are congruent and parallel. Cone Three dimensional figure with a circular base and a curved surface that forms the vertex opposite the base. Sphere Three dimensional figure where every point is the same distance from the center. Pyramid A polyhedron named for its base. All other faces are triangles that meet at a common vertex Prism A polyhedron named for its two congruent and parallel bases. All other faces are parallelograms. Polyhedron Three dimensional figure made of flat surfaces that are polygons.