Geometry Cross word puzzle

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Across
  1. 3. A Property that uses a = b, then b = a.
  2. 4. a part of a line between two endpoints.
  3. 8. A tyle of angle less than 90 degrees.
  4. 9. A shape with all sides and angles equal
  5. 10. A shape with all angles the same.
  6. 12. Angle, exactly 180 degrees.
  7. 13. Opposite angles formed by intersecting lines.
  8. 14. Lines that never meet.
  9. 18. An angle with its vertex at the center of a circle.
  10. 19. A line that crosses two or more lines
  11. 20. two angles that add up to 90 degrees.
  12. 21. A shape with all points the same distance from the center.
Down
  1. 1. A type of angle more than 90 but less than 180 degrees.
  2. 2. Angle, exactly 90 degrees.
  3. 5. A shape with all sides the same length.
  4. 6. two angles that add up to 180 degrees.
  5. 7. A Pair of two adjacent angles that form a straight line.
  6. 11. a part of a circle's edge.
  7. 15. A number equals itself.
  8. 16. A line that splits an angle into two equal parts.
  9. 17. a region of a circle bounded by two radii and an arc.