Geometry Familiarity

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Across
  1. 1. Uncountable
  2. 3. Both pairs of sides are equal
  3. 8. Triangle with no equal sides
  4. 9. Half of a diameter
  5. 10. 180 degrees
  6. 11. Rise over run
  7. 12. 7 sided figure
  8. 14. 8 sided figure
  9. 17. 6 sided figure
  10. 18. 4 equal sides and angles
Down
  1. 1. Triangle with 2 equal sides
  2. 2. 2 lines form a 90 degree angle
  3. 3. Two lines that never touch
  4. 4. Angles are all right angles
  5. 5. 15 sided figure
  6. 6. Two times the radius
  7. 7. 3 sided figure
  8. 13. 5 sided figure
  9. 15. Nine sided polygon
  10. 16. 4 equal sides