- APostulate
- BCommon notion (axiom)
- CCorollary
- DLemma
Step-by-Step Solution
Euclid used 'postulates' for geometry-specific assumptions and 'common notions' (axioms) for general assumptions.
Answer: B) Common notion (axiom)
An axiom that applies to mathematics in general (not only geometry) is called a:
Class 9Euclid's PostulatesGeometry — Foundations
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