Vocabulary crossword

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Across
  1. 2. A polygon has 9 sides.
  2. 4. The angle between two sides inside a polygon.
  3. 6. An angle that is greater than 90 degrees but less than 180 degrees.
  4. 9. A triangle whose sides are all different.
  5. 11. Exactly equal in size and shape.
  6. 13. A polygon has 4 sides.
  7. 19. A polygon has 8 sides.
  8. 21. A polygon has 5 sides.
  9. 22. A parallelogram with 4 equal sides.
  10. 23. _____________ angles are equal.
  11. 26. The angle between one side of a polygon and the next side extended.
  12. 29. A rectangle with 4 equal sides.
Down
  1. 1. One full _____________ is 360 degrees.
  2. 3. Exactly the same shape but different in size.
  3. 5. A triangle has 3 equal sides.
  4. 7. A collection of letters and numbers without an = sign.
  5. 8. A triangle that has 2 equal sides and 2 equal "base" angles.
  6. 10. A polygon has 7 sides.
  7. 12. Contains an = sign and an unknown to be solved.
  8. 14. An angle smaller than right angle.
  9. 15. A circle has _________ order of rotation symmetry.
  10. 16. Has 2 pairs of equal adjacent sides.
  11. 17. Lines meet at the right angle.
  12. 18. A two-dimensional shape with straight sides.
  13. 20. A polygon has 10 sides.
  14. 22. An angle that has more than 180 degrees but less than 360 degrees.
  15. 24. A parallelogram whose angles are all right angles.
  16. 25. Has only 1 pair of parallel sides.
  17. 27. The plural form of index.
  18. 28. A polygon has all its sides equal and all its angles equal.