Crossword Puzzle

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Across
  1. 3. a plane figure with four equal straight sides and four right angles.
  2. 6. all 4 side shapes are this
  3. 7. a triangle that contains an obtuse interior angle
  4. 8. a plane figure with at least three straight sides and angles, and typically five or more
  5. 9. a angle exactly 90 degrees
  6. 10. a plane figure with three straight sides and three angles
  7. 11. a angle more then 90 degrees
Down
  1. 1. a triangle that has at least 3 acute angles
  2. 2. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides
  3. 4. a triangle with all equal sides
  4. 5. a angle less then 90 degrees