如图,△ABC中,CA=CB,CD,CE分别是角ACB记外角的平分线,AE⊥CE,垂直足为E.在三角形ABC中,CA=CB,CD,CE分别是角ACB及其外角嘚平分线,AE⊥CE,垂足为E,求证,四边形ADCE媞矩形

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如图,△ABC中,CA=CB,CD,CE分别是角ACB记外角的平分线,AE⊥CE,垂直足为E.在三角形ABC中,CA=CB,CD,CE分别是角ACB及其外角嘚平分线,AE⊥CE,垂足为E,求证,四边形ADCE媞矩形
如图,△ABC中,CA=CB,CD,CE分别是角ACB记外角的平分线,AE⊥CE,垂直足为E.
在三角形ABC中,CA=CB,CD,CE分别是角ACB及其外角嘚平分线,AE⊥CE,垂足为E,求证,四边形ADCE媞矩形

如图,△ABC中,CA=CB,CD,CE分别是角ACB记外角的平分线,AE⊥CE,垂直足为E.在三角形ABC中,CA=CB,CD,CE分别是角ACB及其外角嘚平分线,AE⊥CE,垂足为E,求证,四边形ADCE媞矩形
提示：
证3个角为直角即可
∠ADC三线合一
∠E 垂直
∠DCE邻补角平分线

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如图,过△ABC的顶点C作CE⊥CA,CD⊥CB,且CE=CA,CD=CB.求证：AD=BE. 如图,等腰直角△ABC中,CA=CB,点E为△ABC外一点,CA=CE,CD平分如图过三角形ABC顶点C作CE垂直于CA,CD垂直于CB,且CE=CA,CD=CB,是说明AD=BE. 如图,△ABC中,CA=CB,CD,CE分别是角ACB记外角的平分线,AE⊥CE,垂直足为E.在三角形ABC中,CA=CB,CD,CE分别是角ACB及其外角嘚平分线,AE⊥CE,垂足为E,求证,四边形ADCE媞矩形如图cA=CB,CE=CD, 如图,等腰直角△ABC中,CA=CB,点E为△ABC外一点,CA=CE,CD平分∠ACB交AE于D,且∠CDE=60°,求证：三角形CBE如图,等腰直角△ABC中,CA=CB,点E为△ABC外一点,CA=CE,CD平分∠ACB交AE于D，且∠CDE=60°，求证：三角形C 如图,在△ABC中,CB=CA,CD⊥AB,点E,F分别是CA,CB的中点,请判断△DEF的形状如图,已知△ABC中,∠C=90°,CA=CB,CD⊥AB于D,CE平分∠BCD交AB于E,AF平分∠A交CD于F求证：EF平行BC 如图已知△ABC中 ∠ACB=90° CA=CB CD⊥AB于D,CE平分∠BCD交AB于E,AF平分∠A交CD于F.如图已知△ABC中 ∠ACB=90° CA=CB CD⊥AB于D,CE平分∠BCD交AB于E,AF平分∠A交CD于F.试判断EF于BC的位置关系,并证明你的结如图过三角形ABC的顶点C作CE垂直于CA,CD垂直于CB,且CE=CA,CD=CB,是说明AD=BE. 如图,△ABC中,AB=AC,CE是△ABC中AB边中线,CB是△ACD的中线证明：CE=1/2CD 如图,在△ABC中,D为AB边上一点,CA=CB,CD=CE,∠ACB=∠ECD=90°.（1）求证：△ACE≌△BCD（2）求∠DAE的度数如图2-12,在△ABC中,CA=CB,D是AB上一点,∠ACD=30°,E是BC上一点,CD=CE,求∠EDB的度数. 如图,在△ABC中,D,E为AB的两个三等分点,向量CA=3倍向量a,向量CB=2倍向量b,求向量CD,向量CE. 如图在△ABC中,CA=CB,BD⊥AC于点E,BD,AE交于点O.(1)求证:CD=CE;(2)求证:OC⊥AB 如图,已知在△ABC中,AD⊥BC于D,E为AC边上一点,连结BE,且CE*CA=CD*CB求证：BE⊥AC.. 如图,已知△ABC中,EF‖AB,BD‖FG,求证:CA/CE=CD/CG 如图在三角形abc中cd垂直ab de垂直ac df垂直bc 垂足分别为d.e.f ca.ce.cb.cf相等吗