Respuesta :
The correct answer among the choices provided is option D. Undefined terms cannot be used as a proof in geometry. Undefined terms are the words that are not formally defined. The three words in geometry that are not formally defined are point, line, and plane.
Answer: D.Undefined Terms
Step-by-step explanation:
The reason in a mathematical proof can be a given information, vocabulary definitions, properties, postulates or previously proved theorems.
But the undefined terms are the terms which used in geometry to define other terms.
Therefore , the undefined terms cannot be used in a mathematical proof .
Hence , D is the correct option.