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Omni-MATH / Let ABC be a triangle with AB<AC, incenter I, and A excenter I_(A). The incircle meets BC at D. Define E=AD∩BI_(A), F=AD∩CI_(A). Show that the circumcircle of △AID and △I_(A)EF are… · Discussion

Discussing Let ABC be a triangle with AB<AC, incenter I, and A excenter I_(A). The incircle meets BC at D. Define E=AD∩BI_(A), F=AD∩CI_(A). Show that the circumcircle of △AID and △I_(A)EF are… · Omni-MATH

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