classifying triangles

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Across
  1. 4. how long a line is
  2. 8. eighty all angles equal up to
  3. 9. angle measures less than 90
  4. 11. three of these make a triangle
  5. 12. use this to find how long a line is
  6. 13. one angle is more than 90
Down
  1. 1. all sides are equal
  2. 2. one angle measures 90
  3. 3. three of these make up a triangle (corners)
  4. 5. all sides are different
  5. 6. greater than something
  6. 7. not more than something
  7. 10. two sides are equal