alleryWhich is a postulate of Euclidean geometry?
APythagorean theorem
BEuler's formula
CThe parallel postulate
DRussell's paradox
Answer & Solution
Correct answer: C. The parallel postulate
1. Euclid started from undefined terms and axioms.
2. The parallel postulate is an example of an assumed statement.
3. The Pythagorean theorem is proved from them.
_Source: Wikipedia, "Axiom" (rev ?), section "Lead section"_
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