Across
- 4. a straight line from the center to the cirfumference
- 7. Two angles that equal 180 degrees
- 10. a straight line passing one side to the other
- 11. two non added adjacent angles that intersect
- 12. either of two angles that one of the sun 90 degrees
- 13. made up of various parts of elements
Down
- 1. two angles that share a common vertex
- 2. the enclosing boundary of a curved geometric figure especially a circle
- 3. a round shape
- 5. space occupied by a shape or a object
- 6. half of a circle
- 8. the outside border of a shape
- 9. the middle