Geometry Terms

8. An angle whose measure is 90 degrees
9. An angle whose measure is between 0 and 90 degrees
11. Part of a line consisting of an endpoint and extending only in one direction
12. A segment that contains the center of a circle and whose endpoints are on the circle
13. An angle whose measure is between 90 and 180 degrees
15. A segment with one endpoint on the center of a circle and the other endpoint on the circle
16. A polygon with four sides
17. A polygon with eight sides
18. Lines that lie in the same plane and do not intersect
20. A straight path that extends in two opposite directions without end

1. A closed plane figure formed by three or more segments
2. A location in geometry
3. A three-dimensional figure with two circular bases that lie in parallel planes
4. The set of all points in a plane that are a given distance from the center
5. A polygon with three sides
6. Lines that intersect to form right angles
7. A polygon with six sides
10. A polyhedron with six faces, each of which is a square
14. A flat surface that extends without end in all directions
19. Formed by two rays with the same endpoint