Proof: Vertical angles are equal | Angles and intersecting lines | Geometry | Khan Academy
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Proof: Vertical angles are equal | Angles and intersecting lines | Geometry | Khan Academy
Proving that vertical angles are equal Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/ang_intro/e/congruent_angles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org/math/geometry/parallel-and-perpendicular ...
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