geometry

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Across
  1. 3. ratio of the adjacent side to the hypotenuse of a right-angled triangle
  2. 7. being essentially comparable to something
  3. 9. the length of the closed curve of a circle
  4. 11. elevation above sea level or above the earth's surface
  5. 12. a surface generated by rotating a line around a fixed line
  6. 13. an area that is in the middle of some larger region
  7. 16. a shape with a circular base and sides tapering to a point
  8. 17. being everywhere equidistant and not intersecting
  9. 19. in or near an inner area
  10. 20. determine the dimensions of something or somebody
Down
  1. 1. of equal importance, rank, or degree
  2. 2. a point equidistant from the ends of a line or the extremities of a figure
  3. 4. the length of a straight line through the center of a circle
  4. 5. a plane curve with every point equidistant from the center
  5. 6. the property created by the space between two objects
  6. 8. a closed figure with four equal sides and four right angles
  7. 10. a line enclosing a plane area
  8. 14. 90 degree angle
  9. 15. corresponding in character or kind
  10. 18. a specific identifiable position in a continuum or series