Across
- 1. space occupied by a 3-dimensional shape
- 4. 4 congruent sides
- 8. space occupied by a flat shape or the surface of an object
- 10. Flipping an image across an axis on a graph
- 11. 3-dimensional triangle
- 13. 4 right angles
- 14. co-planar straight lines that do not intersect at any point
- 16. Vertical line on a graph
- 19. straight line that goes from each side of a circle while touching the center
Down
- 2. Angle(s) above 90 but lower than 180
- 3. straight line segment whose endpoints both lie on a circular arc
- 5. set of straight lines passing through one point
- 6. portion cut off in a line
- 7. the space (usually measured in degrees) between two intersecting lines
- 9. Starting point (0,0) on a graph
- 12. Horizontal line on a graph
- 15. 4 right angles with 4 congruent sides
- 17. Angle(s) below 90
- 18. middle of a line segment
- 20. straight line from the center to the circumference of a circle or sphere