GEOMETRY

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Across
  1. 2. an angle between 90 and 180 degrees
  2. 8. four-sided polygon
  3. 10. no intersection
  4. 11. triangle
  5. 15. the length of the closed curve of a circle
Down
  1. 1. the property created by the space between objects
  2. 3. three sided figure
  3. 4. four equal sides
  4. 5. at an angle
  5. 6. cross paths
  6. 7. no sides
  7. 9. the space between two lines that intersect
  8. 12. angle less than 90 degrees but more than 0
  9. 13. determine the size of something
  10. 14. corresponding in character or kind