Geometry:7-6
IndirectProof
Name:______________________
Date:_______________________
Notes:
IndirectReasoning-assumetheconclusionisfalseandthenshowthatthis
assumptionleadstoa_____________________
IndirectProof/ProofbyContradiction-aproofusingindirectreasoning
1. Assumetheconclusionis________________.
2. Showthattheassumptionleadstoa__________________________of
hypothesisorfact.
3. Concludethatsincethefalseconclusionleadstoanincorrect
statement,thentheoriginalstatementis________________.
Ifx=5,then2x+1≠15.
If3x<12,thenx<4.
Geometry:7-6
IndirectProof
Notes(continued):
A
B
D
C
ExteriorAngleInequalityTheoremProof:
Name:______________________
Date:_______________________