Vocab Review: Logic, Lines, and Angles

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Across
  1. 2. Straight path extending infinitely both ways.
  2. 4. Case that proves a statement false.
  3. 7. Angle formed by extension of adjacent side.
  4. 14. Part of a line with one endpoint.
  5. 16. A statement accepted as true without proof.
  6. 17. An angle measuring exactly 90°.
  7. 18. Two lines in a plane that never intersect.
  8. 19. Line or ray dividing something in half.
  9. 20. An angle inside a polygon.
  10. 26. Switches the “if” and “then” parts.
  11. 27. Negates both the “if” and “then” parts.
  12. 28. If p→q is true and p is true, then q is true.
  13. 29. Adjacent angles that form a straight line.
  14. 30. Interior angles on opposite sides of transversal.
  15. 31. Set containing all elements of multiple sets.
  16. 32. Two angles that sum to 180°.
  17. 33. Flat surface extending infinitely in 2D.
  18. 34. Two angles that sum to 90°.
Down
  1. 1. Set containing only common elements of sets.
  2. 3. Exterior angles on the same side of transversal.
  3. 5. A statement that has been proven true.
  4. 6. A part of a line with two endpoints.
  5. 8. Exterior angles on opposite sides of transversal.
  6. 9. A line that crosses two or more lines.
  7. 10. If p→q and q→r, then p→r.
  8. 11. Switches and negates both the “if” and “then” parts.
  9. 12. An angle measuring less than 90°.
  10. 13. A conditional and its contrapositive are equivalent.
  11. 15. Angles in the same relative position at intersections.
  12. 21. An angle between 90° and 180°.
  13. 22. Interior angles on the same side of transversal.
  14. 23. Uses the phrase “if and only if”.
  15. 24. Opposite angles formed by intersecting lines.
  16. 25. Two lines intersecting at 90°.