Geometry - chapter 3 words

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