Ad-free experience
Study Guides for 1,000+ titles
Full Text content for 250+ titles
No Fear Translations of Shakespeare’s plays (along with audio!) and other classic works
Flashcards
Mastery Quizzes
Infographics
Graphic Novels
AP® Practice & Lessons
Note-taking
Bookmarking
Dashboard
-
Altitude of a Cone
The segment with one endpoint at the vertex of a cone and the other in the plane that contains the base of the cone.
-
Altitude of a Pyramid
The segment with one endpoint at the vertex of a pyramid and the other at the center of the base of the pyramid.
-
Base of a Cone
The simple closed curve that bounds part of the cone.
-
Base of a Cylinder
One of two simple closed curves that lie in parallel planes.
-
Base of a Prism
One of two polygons that lie in parallel planes.
-
Base of a Pyramid
A polygon that bounds part of the pyramid.
-
Center of a Sphere
The fixed point in the interior of a sphere from which all points on the sphere are equidistant
-
Circular Cone
A cone whose base is a circle
-
Circular Cylinder
A cylinder whose base is a circle.
-
Concave Simple Closed Surface
A simple closed surface in which one or more segments* drawn between points on the surface lie partially or wholly outside the surface.
-
Concentric Spheres
Spheres that share a common center.
-
Cone
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.
-
Convex Simple Closed Surface
A simple closed curve in which a segment joining any two points on the surface lies entirely in the interior of the surface.
-
Cube
A regular polyhedron with six faces, all of which are congruent squares.
-
Cylinder
A geometric surface composed of two congruent simple closed curves lying in parallel planes and segments of parallel lines joining the curves.
-
Dodecahedron
A twelve-faced regular polyhedron whose faces are all congruent regular pentagons.
-
Edge
The intersection of two polygons in a polyhedron.
-
Face
A polygon in a polyhedron.
-
Geometric Solid
A region in space bounded by a closed surface.
-
Hemisphere
Exactly half of a sphere.
-
Isocahedron
A twenty-faced regular polyhedron whose faces are all congruent triangles.
-
Lateral Edge
An edge of a polyhedron, usually refers to a prism or a pyramid.
-
Lateral Face of a Prism
The parallelograms of a prism whose edges are the segments that connect the bases.
-
Lateral Face of a Pyramid
The triangles of a pyramid.
-
Lateral Surface of a Cone
The set of segments that join the base of a cone with its vertex.
-
Lateral Surface of a Cylinder
The set of segments that join the bases of a cylinder.
-
Octahedron
An eight-faced regular polyhedron whose faces are all congruent triangles.
-
Polyhedron
A simple closed surface composed of regions of intersecting planes--these regions are polygons
-
Prism
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.
-
Pyramid
A polyhedron composed of a polygon and the segments that join that polygon with a fixed point not in the plane of the polygon.
-
Radius of a Sphere
A segment with one endpoint at the center of a sphere and the other endpoint on the sphere.
-
Regular Polyhedron
A polyhedron whose faces are congruent regular polygons
-
Regular Pyramid
A pyramid whose base is a regular polygon and whose altitude intersects the plane of its base at the center of the base.
-
Right Circular Cone
A circular cone whose altitude intersects with the plane of the base at the center of the base.
-
Right Circular Cylinder
A circular cylinder whose lateral edges are perpendicular to the planes that contain the bases.
-
Right Prism
A prism whose lateral edges are perpendicular to the planes of the bases.
-
Simple Closed Surface
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.
-
Sphere
A surface whose points all lie an equal distance from a fixed point in space.
-
Surface
A geometric figure that traces the motion of a curve in space. A surface is two-dimensional, but can span three dimensions.
-
Tetrahedron
A four-faced regular polyhedron whose faces are all congruent triangles.
-
Vertex of a Cone
The fixed point that is the endpoint of all the segments that form the lateral surface of a cone.
-
Vertex of a Polyhedron
Any point on a polyhedron that is the intersection of three or more faces.
-
Vertex of a Pyramid
The fixed point at the intersection of all the faces of the pyramid.
