crossword

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Across
  1. 3. exact of 90
  2. 6. right angle
  3. 7. more than 90
  4. 9. perpendicular distance from one vertex to another side
  5. 11. divides a side into two equal parts
  6. 12. all angles are equal
Down
  1. 1. less than 90
  2. 2. corners
  3. 4. opposite side of right angle in a triangle
  4. 5. exact copy of a triangle
  5. 8. measurement of all sides are different
  6. 10. 2 sides are equal