Across
- 4. Rewrite the conditional statement with "if and only if"(iff) in the middle and take out the "if" and "then".
- 6. Using facts and rules instead of patterns to make a conclusion.
- 8. if a = b, then b can replace a in any expression
- 10. An example used to prove a conjecture or a statement false. It can be a number, drawing, or another statement.
- 12. Two lines which do not intersect and are not coplanar (not parallel)
- 14. y−y₁=m(x−x₁) where m is the slope and (x₁,y₁) is a point it pass through.
- 15. a proof with two columns, one for the statement and one for the reasons. (postulates/theorems/definitions)
- 16. If a=b, then b=a
- 18. The part that follows the word "if" in a conditional statement or the 1st part
- 19. the property that says that everything is equal to (or congruent to) itself; AB=AB
- 21. y=mx + b, where m is the slope and b is the y-intercept of the line
- 24. A proof that arranges the statements and their matching reasons in paragraph form.
- 25. Angles that are in the same position if the lines are stacked on each other.
Down
- 1. Two angles that are between the two lines on the same side as the transversal.
- 2. Nonadjacent exterior angles lying on opposite sides of a transversal
- 3. A proof that uses arrows and boxes to show the flow of the proof
- 5. a(b+c)=a×b + a×c
- 7. The part that follows the word "then" or the 2nd part in a conditional statement
- 9. Two lines that are in the same plane, but do not intersect
- 10. It is formed by switching the hypothesis and conclusion in a conditional statement.
- 11. If a=b and b=c, then a=c
- 13. Nonadjacent interior angles lying on opposite sides of a transversal.
- 17. It is formed by switching the hypothesis and conclusion in a conditional statement.
- 20. formula m=(y₂-y₁)/(x₂-x₁); controls how much a line slants and in what direction.point slope
- 22. The statement formed by a negation of both the hypothesis and conclusion of the converse.
- 23. a line that intersects two or more coplanar lines at different points.