geometry crossword puzzle

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Across
  1. 2. a shape with 4 sides that are all the same length
  2. 5. a shape with 3 sides
  3. 9. when 2 lines meet and make 90 degree angle(s)
  4. 12. a ling from the center of a circle to the edge
  5. 14. could be known as an angle or corner
  6. 15. a point that is represented by a dot
  7. 16. a shape with 2 pairs of parallel lines but usually 2 sides are longer than the other 2, but not always
  8. 19. also known as a line
  9. 20. could be known as an edge
Down
  1. 1. an angle that is less than 90 degrees
  2. 3. any flat shape that has 4 sides
  3. 4. where two rays meet
  4. 6. a line across a circle
  5. 7. a shape with 8 sides
  6. 8. an angle between 90 and 180 degrees
  7. 10. a 4 sided shape with 2 pairs of parallel lines
  8. 11. the distance around a flat shape
  9. 13. a shape that has the same amount of sides as angles
  10. 17. the space a flat shape takes up
  11. 18. the space a 3 dimensional shape takes up