Across
- 5. a line that divides something into two equal parts
- 10. two rays with a common end point
- 11. points that lie on the same line
- 12. the distance around a two dimentional shape
- 13. a part of a line bounded by two points
- 14. the amount of space inside the boundary of a two dimentional object
- 15. where the x-axis and y-axis meet on a coordinate plane
- 18. an angle that measures more than 90 degrees but less than 180
- 19. coplaner lines that do not intersect; two lines that are the same distance apart and never touch
- 21. points that lie on the same plane
Down
- 1. the sum of two angles is 90 degrees
- 2. an angle that measures less than 90 degrees
- 3. lines that meet to form 90 degree angles
- 4. the middle point of a line segment
- 6. a line with a single endpoint that extends indefinitely in one direction
- 7. geometric elements of equal measure
- 8. the distance around a circle; a circle's perimeter
- 9. two angles with a common side but no common interior points
- 16. a precise location on a plane
- 17. the sum of two angles is 180 degrees
- 20. four parts of a coordinate plane