Geometry Crossword Puzzle

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Across
  1. 2. parallelogram with 4 congruent sides
  2. 5. A quadrilateral with four congruent sides and four congruent angles
  3. 7. An angle that is more that 180 but less than 360 degrees
  4. 9. To lines which go in the same direction but do not meet or curve
  5. 12. half a circle
  6. 13. Has no dimension, but can be visualized as a specific position in space and is usually represented by a small dot
  7. 14. An angular point of polygon or polyhedron
  8. 16. Part of a line that starts at a particular point and extends infinitely far in one direction
  9. 17. The sum of two angles that equal 90 degrees
  10. 19. line segment that joins to vertices in a polygon
  11. 21. A quadrilateral with at least one pair of parallel sides
Down
  1. 1. line segment joining two points on a curve
  2. 3. The sum of two angles that equal 180 degrees
  3. 4. It has four sides and four vertices
  4. 6. The distance around a figure
  5. 8. segment that passes through the center of a circle with both endpoints on the circle
  6. 9. both pairs of opposite sides parallel
  7. 10. Space Occupied by a flat shape
  8. 11. Same size and shape
  9. 15. The space occupied by an object
  10. 18. two rays with a common endpoint
  11. 20. segment that has one endpoint at the center and the other endpoint on the circle