Geometry Terms

4. propertie and relations of points, lines, and surfaces
6. a solid figure with many plane faces, typically more than six.
10. plane figure with three straight sides and three angles.
12. four-sided plane rectilinear figure with opposite sides parallel.
13. the amount of space that a substance or object occupies
14. parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
16. the quantity that expresses the extent of a two-dimensional figure or shape
19. a flat surface that forms part of the boundary of a solid object
20. a polyhedron formed by connecting a polygonal base and a point

1. mathematical relationship or rule expressed in symbols.
2. each angular point of a polygon, polyhedron, or other figure.
3. at an angle of 90° to a given line, plane, or surface.
5. the area of such an outer part or uppermost layer.
7. a flattened out three dimensional solid
8. a quadrilateral whose four sides can be grouped into two pairs of equal-length
9. Breaking It Down
11. a quadrilateral with only one pair of parallel sides.
15. a side of a polygon or a face of a polyhedron
17. a particular type of line segment joining two vertices in a polygon
18. a solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.