Geometry Crossword

4. coplaner lines that do not intersect; two lines that are the same distance apart and never touch
6. two rays with a common end point
7. where the x-axis and y-axis meet on a coordinate plane
8. points that lie on the same line
10. the distance around a circle; a circle's perimeter
11. points that lie on the same plane
12. an angle that measures more than 90 degrees but less than 180
14. the middle point of a line segment
16. a part of a line bounded by two points
18. an angle that measures less than 90 degrees

1. the sum of two angles is 180 degrees
2. the sum of two angles is 90 degrees
3. the distance around a two dimentional shape
5. four parts of a coordinate plane
8. geometric elements of equal measure
9. the amount of space inside the boundary of a two dimentional object
13. a line that divides something into two equal parts
15. a precise location on a plane
17. a line with a single endpoint that extends indefinitely in one direction