Proof by contradiction

Proof by contradiction

Author: Jonathan Heeren
Description: Construct logical arguments and write proofs of theorems and other results in geometry, including proofs by contradiction. Express proofs in a form that clearly justifies the reasoning, such as two-column proofs, paragraph proofs, flow charts or illustrations. 

a) I can construct logical arguments.

b) I can write proofs of theorems.

c) I can write proofs of contradiction.

d) I can use multiple forms to express a proof that

    clearly justifies reasoning.

See More
Introduction to Psychology

Analyze this:
Our Intro to Psych Course is only $329.

Sophia college courses cost up to 80% less than traditional courses*. Start a free trial now.


Notes on Indirect Proof

Please copy down these notes into your notebooks.

introduction to indirect proof

This is a basic definition and some examples of indirect proof.

A video explaining how indirect proof works.

Indirect Proofs

Full Screen

indirect proof and reasoning

Full Screen

Worksheet on Indirect Proofs

Can you take an indirect proof from start to finish?

Full Screen