Problem 649: Archimedes' Book of Lemmas: Proposition 10, Tangent, Chord, Parallel

Online Geometry

AB and AC are two tangents to a circle and AD cuts it. Let CE be the chord through C parallel to AD, and let BE meet AD in F. Then, if FG be drawn perpendicular to CE, it will bisect it in G. See also iPad Productivity Apps; Adobe Spark Post



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