It's Worth a "Tri" - Crossword Puzzle

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Across
  1. 2. A triangle that has 3 sides that are unequal.
  2. 4. A triangle with all three angles less than 90 degrees.
  3. 6. A triangle that has at least 2 sides of equal length.
  4. 8. A triangle in which all 3 angles are equal (60 degrees each).
  5. 10. A triangle with 1 angle measuring exactly 90 degrees.
  6. 11. A triangle with at least 1 angle measuring greater than 90 degrees.
Down
  1. 1. Triangles with corresponding angles and proportional sides.
  2. 3. A triangle that has sides which are all equal.
  3. 5. Triangles that have equal lengths of sides and equal measures of each angles.
  4. 7. The triangular area in the Atlantic Ocean where a number of ships and aircrafts have mysteriously disappeared.
  5. 9. A triangle that has its sides as the chords of the adjacent arcs of a circle.