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If AB = PQ and PQ = XY, then by Euclid's first axiom, AB equals:

Class 9Euclid's AxiomsGeometry — Foundations
  • AXY
  • BAB + XY
  • Chalf of XY
  • Dtwice XY

Step-by-Step Solution

Things equal to the same thing are equal to one another: AB = PQ and PQ = XY give AB = XY.
Answer: A) XY

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