Math Words Crossword Puzzle by Aidan Lau

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Across
  1. 1. (Of a polygon) having all sides connected to another, forming an angle.
  2. 4. A 9-sided polygon.
  3. 8. (Of a triangle) having 1 angle greater than 90 degrees.
  4. 9. A 3-sided polygon with the interior sum equal to 180 degrees.
  5. 10. A closed geometric figure with all sides straight and more than 2 of them.
  6. 12. (Of a triangle) having 1 angle equal to 90 degrees.
  7. 15. Having one angle greater than 180 degrees; "caving in."
  8. 17. A 6-sided polygon.
  9. 18. Having all sides and angles the same measure.
  10. 19. Having all sides the same length.
  11. 21. A 5-sided polygon with an interior sum of 540 degrees.
Down
  1. 2. A 10-sided polygon.
  2. 3. (Of a triangle) having no sides or angles the same measurement.
  3. 5. An 8-sided polygon.
  4. 6. A polygon with 4 sides and an interior sum of 360 degrees.
  5. 7. AKA heptagon; A 7-sided polygon.
  6. 11. Not having all sides or angles the same measure.
  7. 13. (Of a triangle) having 2 angles or sides the same measure.
  8. 14. A 12-sided polygon.
  9. 16. Having all interior angles less than 180 degrees; sticking out.
  10. 20. (Of a triangle) having all angles less than 90 degrees.