Geometry

3. A tool curved into a half circle to measure an angle.
4. An angle that is less than 90⁰.
7. The unit used in measuring angles.
9. This refers to the length or distance around a closed two-dimensional figure or shape.
11. These are 2 angles that form a right angle.
16. A kind of line that has a beginning but no end.
17. A combination of 2 lines, specifically 2 rays, with a common starting point.
18. A kind of line that has a beginning and end.
20. An element of geometry that is represented with arrows on both ends to show that it is continuous.

1. These are 2 lines that would never cross or even get closer together.
2. An angle that is exactly 180⁰.
5. An angle that is greater than 90⁰ but less than 180⁰.
6. These are 2 lines that intersect at one point and would form right angles.
8. An angle that is exactly 360⁰.
10. An angle that is exactly 90⁰.
12. These are 2 angles that form a straight angle.
13. A closed two-dimensional figure made up of straight lines. It may also mean “shape” or “plane.”
14. An element of geometry that is two-dimensional and takes at least 3 points to form.
15. An element of geometry that gives a specific location and has no length, width, shape, or size.
16. An angle that is greater than 180⁰ but less than 360⁰.
19. A term that has a Greek root meaning “measurement of earth.”