Euclidean Geometry I

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Across
  1. 1. A triangle that has one obtuse angle
  2. 8. statement that has been proven
  3. 9. A triangle with exactly 3 congruent sides
  4. 11. A triangle whose three angles are acute
  5. 13. Point, Line (straight line), Plane
  6. 15. Logical argument for the theorem statement
  7. 16. The city where Euclid was born
  8. 18. The English for “piano”
Down
  1. 2. A polygon with three edges and three vertices
  2. 3. Statement that is accepted as true without proof
  3. 4. A triangle with at least 2 congruent sides (i.e. 2 or 3 congruent sides)
  4. 5. A triangle with no congruent sides
  5. 6. The English for “retta”
  6. 7. The English for “punto”
  7. 10. A triangle that has one angle that is a right angle
  8. 12. Statement that defines what something is
  9. 14. Another kind of Geometry
  10. 17. The title of the book written by Euclid