Geometry+5-3

=__**Indirect Proofs**__=

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 * __Key terms to know__**

__Indirect Reasoning -__ reasoning that assumes that the conclusion is false and then shows that this assumption leads to a contradiction of the hypothesis or some other accepted fact like a postulate theorem or corollary. __Indirect Proof-__ in an indirect proof one assumes that the statement to be probed is false one then uses logical reasoning to deduce that a statement contradicts a postulate. __Proof by Contradiction-__ an indirect proof in which one assumes that the statement to be probed is false. one then used logical reasoning to deduce a statement that contradicts a postulate theorem or one of the assumptions.

When using Indirect Reasoning you assume that the conclusion is false and then show that this assumption leads to a contradiction of the hypothesis or some other accepted face such as a definition, postulate, theorem, or corollary. A proof of this type is called indirect proof or a proof by contradiction.

1.) Assume that the conclusion is false. 2.) Show that this assumption leads to a contradiction of the hypothesis or some other facet such as a definition, postulate, theorem or corollary. 3.) Point out that because the false conclusion leads to an incorrect statement, the original conclusion must be true.

__**Help**__ [|Indirect Proofs Help]