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مشاهدة النسخة كاملة : رقم(40)


على حسين خلف
08-06-2009, 04:16 AM
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على حسين خلف
08-06-2009, 04:34 AM
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أحمد سعد الدين
19-07-2009, 11:09 PM
Problem 40. Triangle, Incenter, Excenter. Level: High School, SAT Prep, College
In triangle ABC, the angles A and B measure 80 and 40 respectively, I is the incenter and E the excenter. AB and CE meet at D. If BC = a, AC = b and CI = d, prove that ..

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