The segment with one endpoint at the vertex of a cone and the other in the plane that contains the base of the cone.
The segment with one endpoint at the vertex of a pyramid and the other at the center of the base of the pyramid.
The simple closed curve that bounds part of the cone.
One of two simple closed curves that lie in parallel planes.
One of two polygons that lie in parallel planes.
A polygon that bounds part of the pyramid.
The fixed point in the interior of a sphere from which all points on the sphere are equidistant
A cone whose base is a circle
A cylinder whose base is a circle.
A simple closed surface in which one or more segments* drawn between points on the surface lie partially or wholly outside the surface.
Spheres that share a common center.
A surface that includes a simple closed curve and the segments that join all the points on that curve with a single fixed point not in the plane of the curve.
A simple closed curve in which a segment joining any two points on the surface lies entirely in the interior of the surface.
A regular polyhedron with six faces, all of which are congruent squares.
A geometric surface composed of two congruent simple closed curves lying in parallel planes and segments of parallel lines joining the curves.
A twelve-faced regular polyhedron whose faces are all congruent regular pentagons.
The intersection of two polygons in a polyhedron.
A polygon in a polyhedron.
A region in space bounded by a closed surface.
Exactly half of a sphere.
A twenty-faced regular polyhedron whose faces are all congruent triangles.
An edge of a polyhedron, usually refers to a prism or a pyramid.
The parallelograms of a prism whose edges are the segments that connect the bases.
The triangles of a pyramid.
The set of segments that join the base of a cone with its vertex.
The set of segments that join the bases of a cylinder.
An eight-faced regular polyhedron whose faces are all congruent triangles.
A simple closed surface composed of regions of intersecting planes--these regions are polygons
A polyhedron composed of two congruent polygons that lie in parallel planes and the segments that are part of parallel lines that join the congruent polygons.
A polyhedron composed of a polygon and the segments that join that polygon with a fixed point not in the plane of the polygon.
A segment with one endpoint at the center of a sphere and the other endpoint on the sphere.
A polyhedron whose faces are congruent regular polygons
A pyramid whose base is a regular polygon and whose altitude intersects the plane of its base at the center of the base.
A circular cone whose altitude intersects with the plane of the base at the center of the base.
A circular cylinder whose lateral edges are perpendicular to the planes that contain the bases.
A prism whose lateral edges are perpendicular to the planes of the bases.
A surface that divides space into three distinct regions: 1) points in the interior of the surface, which always form the endpoints of finite segments; 2) points on the surface; and 3) points in the exterior of the surface, which can form the endpoints of infinite segments.
A surface whose points all lie an equal distance from a fixed point in space.
A geometric figure that traces the motion of a curve in space. A surface is two-dimensional, but can span three dimensions.
A four-faced regular polyhedron whose faces are all congruent triangles.
The fixed point that is the endpoint of all the segments that form the lateral surface of a cone.
Any point on a polyhedron that is the intersection of three or more faces.
The fixed point at the intersection of all the faces of the pyramid.