Geometry/Neutral Geometry/Incidence Geometry

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Incidence Axioms[edit | edit source]

Incidence Axiom 1[edit | edit source]

For every point P and for every point Q not equal to P, there exists a unique line l incident with P and Q.

Incidence Axiom 2[edit | edit source]

For every line l, there exists at least two distinct points incident with l

Incidence Axiom 3[edit | edit source]

There exists three distinct points with the property that no line is incident with all three of them