Geometry Vocabulary

2. Segment joining the two base planes and perpendicular to both
4. A flat surface that goes on forever in all directions
6. The distance around a circle.
9. arc Arc whose measure is greater than a semi-circle (180 degrees)
10. Arc whose measure is less than a semi-circle (180 degree)
11. Has a vertex and a circular base
15. Segment whose endpoints are the center of the circle and a point on the circle
16. A statement or conjecture that can be proven true by given, definitions, postulates, or already proven theorems
17. Line in the plane of the circle that intersects the circle in one point
18. Segments that have the same length
20. Angle that measures 180 degrees

1. An angle that is more that 90 degrees and less than 180 degrees
3. Of a 3-dimensional figure is the number of cubic units contained in the solid
5. Chord that passes through the center of the circle
7. Angles that have the same measure
8. An angle that is less than 90 degrees but more than 0 degrees
12. A point that divides a segment into two congruent segments
13. Congruent polygons lying in parallel planes
14. Segment that connects two points on the circle
19. Point on a line segment that divides it into two equal parts