Geometry Crossword Puzzle

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Across
  1. 2. an example that disproves a statement or conjecture by demonstrating that the statement is not always true
  2. 4. formed when a transversal passes through two lines
  3. 5. each of the pairs of opposite angles made by two intersecting lines.
  4. 8. any geometric figure (line, angle, shape, etc.) is congruent to itself
  5. 10. the "if" part of a conditional statement
  6. 14. lines that never intersect
  7. 15. a statement or proposition that is believed to be true based on observations or patterns
  8. 17. a line that intersects two or more other lines
  9. 19. combines a conditional statement and its converse, using "if and only if"
  10. 20. a statement that is accepted as true without proof
  11. 21. two lines that intersect at a 90-degree angle
  12. 22. formed when two lines are intersected by a transversa
  13. 23. if two figures are congruent to a third figure, then they are also congruent to each other
Down
  1. 1. two angles whose measures add up to 180 degrees
  2. 2. negating both the hypothesis and the conclusion, and then switching their order (if not q, then not p).
  3. 3. a statement that can be proven true using logical reasoning
  4. 6. the part of a conditional statement that follows the "if" statement
  5. 7. formed when a transversal line intersects two parallel lines
  6. 9. shape or object has matching parts
  7. 11. a measure of its steepness
  8. 12. formed when a transversal intersects two lines
  9. 13. neither parallel nor intersecting
  10. 15. a pair of angles formed on the same side of a transversal when two parallel lines are crossed
  11. 16. forming the opposite of a given statement
  12. 18. two adjacent angles that form a straight line (or 180 degrees) when combined