16.6 Proof by Contradiction and Reasoning in Geometry
Point 2 of 4
16.6.2 The Steps of Proof by Contradiction
Core idea
Three steps: first assume the opposite of the conclusion, then derive a contradiction, and finally reject the assumption and affirm the original claim
Module goal. Build on all the earlier proofs to distill a new tool of argument, proof by contradiction, and close out this stage with it, laying groundwork for the trickier reasoning in similarity
eastmath.com · 16.6 Proof by Contradiction and Reasoning in Geometry · 16.6.2 The Steps of Proof by Contradiction