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A theorem is a notion that is accepted  as a truth through mathematical and experimental proofs. If there is an undefined term, then it is not considered as a truth. An undefined term means that something is wrong with the line with proof. answer is false

The correct answer is:


False.


Explanation:


An undefined term can be used in a proof.


There are three fundamental undefined terms in geometry: point, line and plane. All three of these can be used in a proof; therefore the statement that an undefined term cannot be used in a proof is false.