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If AB = CD and CD = EF, then AB = EF. This conclusion uses which axiom?

Class 9Euclid's PostulatesGeometry — Foundations
  • AThe whole is greater than the part
  • BThings equal to the same thing are equal to one another
  • CAll right angles are equal
  • DA circle has one centre

Step-by-Step Solution

AB and EF are each equal to CD, so they are equal to each other — the transitivity axiom.
Answer: B) Things equal to the same thing are equal to one another

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