math crossword

2. Instead of showing that the conclusion to be proved is true you show that the entire alternative is false.
5. statement presented in justification or explanation of a belief or action or a proof.
6. The logical statements are written on the left side and its corresponding reasons on the right side.
8. It is a statement which is accepted or known at the beginning.
9. method of reasoning in which the premises are viewed as supplying some evidence but not full assurance for the truth of conclusion.
10. used to find the exact center point between two defined points in a line segment.
12. process of reaching a logical conclusion after thinking about all the relevant facts.
13. study of formal reasoning based upon statements or propositions.
15. logical argument in which statement is supported or justified.
16. statement or idea taken to be true and on which an argument or reasoning may be base.
18. It is the process of reasoning from one or more statements to reach a logical Conclusion.
19. statement accepted after it is proven deductively.
20. way of showing the truth or falsehood of a given statement without making any assumptions.

1. a statement that is accepted without proof.
3. altering a statement by converting it to it's negative form.
4. is a statement drawn from the hypothesis.
7. If a point is between two other points on a line addition or subtraction can be used to find a missing measure is called ______________________.
11. This statements are presented using complete sentences backed up by reason.
14. logically equivalent to the original statement.
17. it is not logically equivalent to the original statement.