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A plot of land is a rectangle. Diagonally opposite corner posts are joined by a straight wire. The owner says only one straight wire path is possible between the two corner posts.
This claim relies on which postulate?

Class 9Euclid's AxiomsGeometry — Foundations
  • AA unique straight line joins two distinct points
  • BA circle can be drawn with any centre
  • CAll right angles are equal
  • DA line can be produced indefinitely

Step-by-Step Solution

Only one straight line (the wire) can pass through the two corner posts, by Euclid's first postulate.
Answer: A) A unique straight line joins two distinct points

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