Geometry Vocab

4. A segment from the center of a circle to a point on the circle.
5. The side opposite the right angle in a right triangle.
8. A line, ray, or segment that divides an angle or segment into two congruent parts.
12. The name associated with the theorem a² + b² = c².
14. A part of a line with two endpoints.
17. Two lines that intersect to form right angles.
18. A figure formed by two rays with a common endpoint.
20. A polygon with three sides.
21. A transformation that turns a figure around a fixed point.
22. A segment through the center of a circle with endpoints on the circle.
23. A mathematical statement that has been proven.

1. A transformation that enlarges or reduces a figure using a scale factor.
2. Figures that have the same shape but may have different sizes.
3. Two coplanar lines that never intersect.
6. Two angles whose measures add to 180 degrees.
7. A transformation that slides every point the same distance in the same direction.
9. The distance around a circle.
10. Figures that have the same size and shape.
11. Two angles whose measures add to 90 degrees.
13. A transformation that flips a figure across a line.
15. A closed plane figure made of line segments.
16. The common endpoint of the rays that form an angle.
19. A part of a line with one endpoint that extends forever in one direction.