triangles

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Across
  1. 4. The lengths of all sides are different.
  2. 5. One angle is greater than 90°.
  3. 6. One angle is 90°.
Down
  1. 1. The lengths of all sides are equal.
  2. 2. The lengths of two sides are equal.
  3. 3. All three angles are less than 90°.