Question

Proving $\sqrt{2}$ is an irrational number is an example of which type of proof?

• A. Direct
• B. Indirect

Answer 1

The correct option is B Indirect

Proving $\sqrt{2}$ is an irrational number is an example of indirect proof. As we prove $\sqrt{2}$ is an irrational number starting by assuming $\sqrt{2}$ is an rational number and then proving it is wrong.