Geometry Vocabulary

4. the space (usually measured in degrees) between two intersecting lines.
5. the line segment joining two points on a curve.
6. The larger of the two arcs
8. a part of the circumference of a circle or other curve.
12. a plane figure with three straight sides and three angles.
14. exactly equal shape and size.
15. one whose vertex is on the circle and whose legs are secants of the circle.
16. the branch of mathematics concerned with the properties of points, lines, surfaces, solids.
19. a line touching circles at only one point.
21. the ratio of the adjacent side to the hypotenuses.

1. The smaller of the two arcs
2. a portion or part of a circle that is composed of an arc and its two radii.
3. The distance around the boundary of a circle
7. A line from the central point to circumference
9. a round plane figure whose sides consist of points around from a fixed point.
10. with vertex is located on a circle's central angle and legs are on the circle's circumference.
11. the ratio of the opposite side to the hypotenuse.
13. the total space taken up by a flat (2-D) surface or shape of an object.
17. The middle point of a line that is equal length on both sides.
18. a line passing through two points of a curve.
20. a list of Reasons used to prove that a given mathematical concept or idea is true.