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A long straight irrigation canal in a Bihar village starts as a 50 m marked segment but the engineer plans to keep extending it straight, year after year, with no fixed end.
Which Euclidean postulate makes this continual straight extension valid in geometry?

Class 9Euclid's AxiomsGeometry — Foundations
  • AA terminated line can be produced indefinitely
  • BAll right angles are equal
  • CA unique line passes through two points
  • DA circle can be drawn with any radius

Step-by-Step Solution

Euclid's second postulate allows a terminated line (segment) to be extended indefinitely, supporting the canal's endless straight extension.
Answer: A) A terminated line can be produced indefinitely

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