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# 3D Shapes

### Geometry

Place or position on a plane. Point.
Part of a line, has one fixed endpoint, and extends infinitely along the line from the end point. Ray.
Part of a line that is bounded by two distinct end points, and contains every point on the line between its end points. Line segment.
A set of points that extend infinitely in both directions. Line.
A flat service that stretches infinitely. Plane.
Two lines in a plane meet at _________ point/s or ________ point/s. One, zero.
If lines in the same plane do not intersect, we say they are ____________. Parallel.
Lines that are in different planes and do not intersect, but are not parallel. Skew lines.
Two planes will meet at a ____________. Line.
If two planes are parallel and a third plane intersects them, the intersection can be described as _________ ___________ __________. Two parallel lines.
If a point is on a plane, there is/are ________ line/s that goes through the point and is perpendicular to the plane. One.
Two planes that are __________to the same plane are parallel planes. Perpendicular.
Two lines perpendicular to the same plane are ________ __________. Parallel lines.
Any flat surface of a three dimensional object. Face.
Line segment where two faces intersect. Lateral edge.
Point of intersection of three lateral edges. Vertex.
Slice of a three dimensional object. Cross section.
Two parallel faces in a prism or cylinder. Base.
What are the two types of general cylinders? Cylinders and prisms.
What are the two types of cylinders? Right circular cylinders and oblique cylinders.
What are the two types of prisms? Right prisms and oblique prisms.
Three dimensional object with two parallel congruent bases. General cylinder.
A general cylinder whose lateral edges are perpendicular to the base. Right general cylinder.
A general cylinder whose lateral edges are perpendicular to a polygonal base. Right prism.
A general cylinder whose lateral edges are not perpendicular to the polygonal base. Oblique prism.
A general cylinder whose lateral edges are not perpendicular to the circular base. Oblique cylinder.
A three dimensional solid that tapers smoothly from a flat base to a point generally referred to an apex or vertex. General cone.
A general cone with a circular base with the apex or vertex directly over the center of the circular base. Right circular cone.
A general cone with a circular bottom with the apex or vertex not over the center of the base, can be circular or irregular. Non-right circular cone.
A general cone with a polygonal base with its apex or vertex directly over the center of the base. (Right) Pyramid.
A general cone with a polygonal base with its apex or vertex not over the center of the polygonal base. Non-right pyramid.
Formula for the surface area of a sphere. 4πr squared.
If two general cones have the same ________ _________ and the same ________, then cross-sections for the general cones have the same distance from the vertex and have the same area. Base area, height.
Surface area of a sphere. 4 pi r squared.
Cavalier's Principle. If the heights of two solids are the same, and the cross sections of the two solids have the same area, the volumes of the two solids are the same.
Created by: emarciante9