| 11. | The Euclidean plane is not hyperbolic, for example because of the existence of homotheties.
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| 12. | One can consider similar minimal surface problems on other quadrilaterals in the Euclidean plane.
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| 13. | Projectivization of the Euclidean plane produced the real projective plane.
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| 14. | By contrast, the group of conformal transformations of the compactified Euclidean plane is only 6-dimensional.
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| 15. | There are 151 4-uniform tilings of the Euclidean plane.
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| 16. | Diffeomorphic to some open set in, the Euclidean plane.
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| 17. | There are 332 5-uniform tilings of the Euclidean plane.
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| 18. | Examples include the polar coordinate system on Euclidean plane, the second important plane coordinate system.
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| 19. | The two-dimensional grid is not hyperbolic ( it is quasi-isometric to the Euclidean plane ).
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| 20. | Elliptic geometry has a variety of properties that differ from those of classical Euclidean plane geometry.
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