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On the mathematical problems of Liberal Arts in senior high school about the proof of plane geometry If a vertex B and C that circle △ ABC, and give AB and AC to point D and point e respectively, the problem of AD: AC = AE: AB is not given graphics... I'm liberal arts, so don't use science knowledge to solve it... Otherwise I can't understand it... Thank you!
When a is outside the circle, AB * ad = AC * AE is obtained from the cutting line theorem, that is, ad: AC = AE: ab
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