已知:如图,AB∥CD.求证:∠CAB=∠CED+∠CDE.
已知:如图,AB∥CD.求证:∠CAB=∠CED+∠CDE.
如图,若∠CAB=∠CED+∠CDE,求证:AB∥CD.
已知CD∥AB,CE∥AD,AD=AB,求证∠CDE=∠CED
如图,已知:点E在AC上,AB∥CD,∠B=∠AEB,∠D=∠CED.求证:BE⊥ED.
已知:如图AB∥CD,点E在AC上,求证:∠A=∠CED+∠D
如图,已知AB‖CD,求证:∠CDE=∠B+∠E.
如图,已知:AB=AC,BD=CD,E为AD上一点,求证:∠BED=∠CED.
已知:如图,AB∥CD,∠BAF=∠F,∠CDE=∠E.求证:AF⊥DE.
如图,∠ABC=∠CED+∠D 求证AB‖CD
已知:如图AC∥BD,AB∥CD,AE和BE分别平分∠CAB和∠DBA,CD过点E.求证:CD=AC+BD
如图,已知AB=AC,AD=AE,∠EAD=∠CAB,BD与CD相较于点O,求证说明:BD=CE.
已知:如图,点E在AC上,AB平行于CD,∠B=∠AEB,∠D=∠CED.求证:BE⊥ED