Question

To prove the statement: "Tangent of a circle is perpendicular to a radius at the point of contact.", the proof was started by "Assume tangent is not perpendicular to radius."
Above method of proof is

• A. Direct method
• B. Contrapositive way
• C. Proof by contradiction
• D. None

Answer 1

The correct option is C Proof by contradiction

In the proof by contradiction we first assume that the statement which we are proving the negation of it is true then we find a contradiction.

In this question the same thing is done.

$C$