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Geometry Basics III
Circles and Solid Figures (Curved and Polyhedrons)
Term | Definition |
---|---|
Circumference | The distance around a circle |
Radius | A line segment from the center of a circle to any point on the outside of the circle. It is equal to half the diameter |
Diameter | A line segment across a circle that passes through the center of the circle |
Chord | A line segment with both endpoints on the outside of the circle, but which does not pass through the center of the circle. |
Arc | A section of the circumference of a circle |
Polyhedron | A solid figure in which all sides are polygons |
Pyramid | A polyhedron that has one base and triangular faces |
Prism | A polyhedron that has two congruent bases |
Edge | The line segment where two faces of a polyhedron meet |
Vertex | The point where three edges meet |
Curved solid | Any solid figure with no edges |
Sphere | A curved solid with no bases or faces |
Cone | A figure with a flat circular base and one curved surface leading to a vertex |
Cylinder | A figure with one curved surface and two parallel bases that are congruent circles |
Hemisphere | Half a sphere with a circular base |
Faces | Connected polygons that makes up a section of a polyhedron |
Sphere | A curved solid that has no base |