Geometreg: Gwahaniaeth rhwng fersiynau

|[[File:Illustration to Euclid's proof of the Pythagorean theorem.svg|96px]] || [[File:Sinusvåg 400px.png|96px]] || [[File:Hyperbolic triangle.svg|96px]] || [[File:Torus.png|96px]] || [[File:Mandel zoom 07 satellite.jpg|96px]] || [[File:Measure illustration.png|70px]]

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