crossword puzzle

1234567891011121314151617181920
Across
  1. 3. the space between two lines or planes that intersect
  2. 5. a plane curve with every point equidistant from the center
  3. 6. relation with respect to comparative quantity or magnitude
  4. 9. of equal importance, rank, or degree
  5. 12. determine the dimensions of something or somebody
  6. 13. triangle is a triangle whose interior angles are all acute
  7. 14. a line enclosing a plane area
  8. 17. relating to or situated in or extending toward the middle
  9. 19. a triangle with two equal sides
  10. 20. the property created by the space between two objects
Down
  1. 1. an area that is in the middle of some larger region
  2. 2. elevation above sea level or above the earth's surface
  3. 4. the length of a straight line through the center of a circle
  4. 7. triangle a triangle that contains an obtuse interior angle
  5. 8. in or near an inner area
  6. 10. angle the 90 degree angle between two perpendicular lines
  7. 11. a group of nearly parallel lines of electromagnetic radiation
  8. 14. being everywhere equidistant and not intersecting
  9. 15. a point equidistant from the ends of a line or the extremities of a figure
  10. 16. the length of the closed curve of a circle
  11. 18. angle an angle between 90 and 180 degrees