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A geometry forms an exception to the fifth postulate. Geometries where the fifth postulate does not hold are called:

Class 9The Fifth PostulateGeometry — Foundations
  • ANon-Euclidean geometry
  • BCoordinate geometry
  • CPlane geometry
  • DSolid geometry

Step-by-Step Solution

Geometries in which Euclid's fifth postulate is replaced by a different parallel statement are called non-Euclidean geometries.
Answer: A) Non-Euclidean geometry

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