已知如图:AE平行BC,AD,BD分别平分角BAE和角ABC,EC过点D.

已知如图:AE平行BC,AD,BD分别平分角BAE和角ABC,EC过点D. 已知AE平行于BC,AD,BD分别平分角EAB,角ABC交EC于点D,EC过点D,求：AB=AE+BC 已知AE平行于BC,AD,BD分别平分角EAB,角ABC交EC于点D,EC过点D,求:AB=AE+BC 如图已知AD,BD分别平分∠EAB和∠CBA,EC过点D,AB=AE+BC,求证:AE平行BC 如图,AE平行BC,AD,BD平分角EAB,角CBA,EC过点D,求证角EAB等于AB等于AE+BC 如图,已知AD,BD分别平分∠EAB和∠CBA,EB过点D,AB＝AE＋BC.求证：AE平行BC 已知：如图AE∥BC,AD,BD分别平分角EAB,角CBA,EC过D.求证：AB=AE+BC 已知AE平行BC,AD、BD平分EAB、CBA,EC过D,求证AB=AE+BC 如图,AD,BD分别平分∠EAB和∠ABC,AE垂直EC于E,BC垂直EC于C.求证：AB=AE+BC 如图,ad平行bc,ae,be分别平分角dab,角abc,cd过点e,求证ab等于ad加bc 附加 如图在三角形ABC中,BD平分角ABC,AD垂直BD,垂足为点D,点E在AC上,且AE等于EC,连接DE求证,DE平行B 如图在三角形ABC中,EF平行BC,且EC平分角DEF,若AD垂直EC,垂足为点G,求证AE=AC