如图,AB=AC,AD=AE,M为BE中点,∠BAC=∠ADE=90°.求证：AM垂直DC

如图,AB=AC,AD=AE,M为BE中点,∠BAC=∠ADE=90°.求证：AM垂直DC 如图,AB=AC,AD=AE,M为BE中点,角BAC=角DAE=90°.求证：AM垂直DC. 3 如图,AB=AC,AD=AE,M为BE中点,∠BAC=∠DAE=90°.求证:AM⊥DC. 如图,AB=AC,AD=AE,M为BE中点,角BAC=角DAE=90度,求证；AM垂直DC, 已知,如图AB=AC,AD=AE,∠ BAC=∠ DAE=90° ,M是BE中点,求证：AM⊥DC 如图所示,∠BAC=∠DAE=90°,M是BE中点,AB=AC,AD=AE,求证AM垂直于CD 15如图,AB=AC,AD=AE.AB、DC相交于M,AC、BE相交于N,∠DAB=∠EAC.求证：AM=AN 如图,在直角三角形ABC中,角BAC=90度,AB=AC,AD=DC,AE垂直BD于M,求证：角ADB=角CDE 如图,∠BAC=90°,AC=DC,M为BC中点,MN‖AD,交AC于N,求证DN=1/2BC. 如图：AB/AD=AC/AE=BC/DE 求证：角B=角ADE 求证：当角BAC=90度时,EC垂直BC 如图,在△ABC和△ADE中,AB=AC,AD=AE,∠BAC=∠DAE=90°.①求证:C 如图,三角形ABC中,AB=AC,AD、AE分别是∠BAC和∠BAC外角的平分线,BE垂直AE（1）求证：DA垂直AE（