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# NorthCrawfordGeoCh11

### Surface Area and Volume

TermDefinition
Polyhedron a space figure, or three-dimensional figure, whose surfaces are polygons.
Edge A segment that is formed by the intersection of two faces.
Vertex A point where three or more edges intersect.
Cross section The intersection of a solid and a plane.
Prism A polyhedron with two congruent, parallel faces, called bases.
Lateral faces The faces that aren't bases.
Altitude of a Prism A prism is a perpendicular segment that joins the planes of the bases.
Height of a Prism Length of an altitude of a prism.
Right prism The lateral faces are rectangles and a lateral edge is an altitude.
Oblique prism Some or all of the lateral faces are non-rectangular.
Lateral area The sum of the areas of the lateral faces.
Surface area The sum of the lateral area and the area of the two bases.
Cylinder Solid that has two congruent parallel bases that are circles.
Altitude of a Cylinder Perpendicular segment that joins the planes of the bases.
Height of a Cylinder The length of an altitude.
Right Cylinder Segment joining the centers of the bases is an altitude.
Oblique Cylinder Segment joining the centers is not perpendicular to the planes containing the bases.
Surface Area of a Cylinder The sum of the lateral area and the areas of the two circular bases.
Pyramid A polyhedron in which one face (the base) can be any polygon and the other faces (she lateral faces) are triangles that meet at a common vertex (called the vertex of the pyramid).
Similar solids Has the same shape, an all their corresponding dimensions are proportional.
Sphere Set of all points in space equidistant from a given point called the center.
Volume The space that a figure occupies.
Created by: mbuening