geometry

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Across
  1. 2. a location
  2. 4. the point at which a line cuts another lin
  3. 7. space occupied by flat shape
  4. 8. use picture
  5. 11. seven sided polygon
  6. 13. opposite to another operation
  7. 14. intersection of the three altitudes of a
  8. 16. line segment from the vertex to the mp
  9. 18. use a picture
  10. 19. angles less than 90 degrees
  11. 20. statement that is regarded as true
Down
  1. 1. eight sided polygon
  2. 3. C=2πr
  3. 5. angles more than 90 degrees
  4. 6. straight figure extending infinitely
  5. 9. line segment that divides angle in two
  6. 10. the Pythagorean _______
  7. 12. an angle of 90 degrees
  8. 15. use picture
  9. 17. use picture