Across
- 2. the total distance from point to point around the shape
- 6. 3-dimensional shape
- 14. triangles with same side lengths
- 16. to suggest or assume the existence of something
- 17. an angle equal to 90 degrees
- 18. all sides are the same length
- 20. a shape with points on the surface all equidistant from the center
- 23. identical in size and shape
- 24. corners of a shape
- 25. a three-dimensional shape with equilateral sides
- 26. a flat two-dimensional surface
- 27. a general proposition proved by a chain of reasoning
- 28. a closed figure with six sides
- 29. a shape with no corners or segment
Down
- 1. the total length around a circle
- 3. father of geometry
- 4. that meeting of two faces
- 5. add up to 180 degrees
- 7. an angle greater than 90 degrees
- 8. the amount a substance can contain
- 9. ten sided shape
- 10. the total distance form the center of a circle edge
- 11. an angle less than 90 degrees
- 12. without a curve
- 13. the slant of a line
- 15. the extent or measurement of land a shape contains
- 16. two lines never intersect
- 19. two lines that make a corner
- 21. add up to 90 degrees
- 22. surface plane of three-dimensional figures