2第7题△ABC中,AB=AC,AD是高。求证(1)BD=CD(2)∠BAD=∠CAD
1个回答
易证△ABD与△ACD全等
(AD=AD,AB=AC,∠ADB=∠ADC=90°)(HL定理)
所以BD=CD
∠BAD=∠CAD得证
这种题都是证明三角形全等的!
相关问题
如图△ABC中,AB=AC,AD是高.求证:(1)BD=CD;(2))∠BAD=∠CAD 最好用HL证明的
在△ABC中,∠BAD=∠CAD ,BD =CD,求证AB=AC
△ABC中,AB=AC、AD是高,求证BD=CD,∠BAD∠DAC
如图,△ABC中,AB=AC,AD是高,求证:∠BAD=∠CAD.
如图,△ABC中,AB=AC,AD是高,求证:∠BAD=∠CAD.
如图,△ABC中,AB=AC,AD是高,求证:∠BAD=∠CAD.
如图,△ABC中,AB=AC,AD是高,求证:∠BAD=∠CAD.
已知如图△ABC中,∠BAD=∠CAD求证AB/AC=BD/CD
在△ABC中,AB=AC,DB=DC,求证:(1)∠BAD=∠CAD(2)AD⊥BC
已知BD=CD,∠BAD=∠CAD求证:AB=AC