【中考数学必备专题】中考模型解题系列之角平分线模型

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1、【中考数学必备专题】中考模型解题系列之角平分线模型一、单选题(共1道，每道20分)1.已知，如图∠A=，BA1平分∠ABC，CA1平分∠ACD；BA2平分∠A1BC，CA2平分∠A1CD；…，以此类推，∠A2012等于（） A. B. C. D. 二、解答题(共2道，每道40分)1.（2011湖南常德）如图，已知四边形ABCD是平行四边形.若AF、BE分别是∠DAB、∠CBA的平分线，求证：DF=EC. 2.已知，如图，在△ODC中，∠D=90°，EC是∠DCO的角平分线，且OE⊥CE，过点E做EF⊥OC交OC于

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