Related terms:
ab
bolyai
gauss
obtuse
prove
klein
saccheri
postulate
two lines
converse
intersect
geometria
euclidean
lobachevsky
right angle
hyperbolic
lines through
quadrilateral
parallel lines
fifth postulate
straight lines
hyperbolic space
straight line
hyperbolic plane
parallel postulate
elliptic geometry
perpendicular
euclidean geometry
distance between
pythagorean theorem
Wikipedia sources:
Hyperbolic geometry
Non-Euclidean geometry
Axiom
Marilyn vos Savant
Parallel postulate
Shape of the Universe
Pythagorean theorem
Parallel (geometry)
Context for words:
hyperbolic
geometry
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