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Theorem euclidean_geometry.collinear_iff_eq_or_eq_or_angle_eq_zero_or_angle_eq_pi

Modification history

2022-12-06 20:53
src/geometry/euclidean/angle/unoriented/affine.lean
feat(geometry/euclidean/angle/unoriented/affine): collinearity lemma (#17634) …
Added euclidean_geometry.collinear_iff_eq_or_eq_or_angle_eq_zero_or_angle_eq_piView on Github →