theorems
Yes, they can. This is done all the time in mathematics, logic and other areas. However, you must ensure that you either record the theorems used, or write them out in whole and attach them to the proof of the new theorem.
No. A postulate need not be true.
Axioms and logic (and previously proved theorems).
6 theorems
Yes he is known for the theorem that has his name.
When a theorem bears the name of a person, such as the Kepler conjecture or the Pythagorean theorem, they are proper nouns. Other theorems that are named by their own description are common nouns.
the theorems and postulates used in the proof
Here are some examples of 10th-grade geometry theorems: https://quizlet.com/subject/geometry-10th-grade-theorems/
They are theorems that specify the conditions that must be met for two triangles to be congruent.
Some theorems on artificial selection was created in 1934.
No, theorems cannot be accepted until proven.