【摘要】全等三角形證明經(jīng)典50題(含答案)1.已知:AB=4,AC=2,D是BC中點(diǎn),AD是整數(shù),求ADADBC解:延長AD到E,使AD=DE∵D是BC中點(diǎn)∴BD=DC在△ACD和△BDE中AD=DE∠BDE=∠ADCBD=DC∴△ACD≌△BDE∴AC=BE=2∵在△ABE中AB-BE<AE<AB+BE∵AB=4即
2025-06-19 22:58
【摘要】2016專題:《全等三角形證明》1.已知:D是AB中點(diǎn),∠ACB=90°,求證:DABC2.已知:BC=DE,∠B=∠E,∠C=∠D,F(xiàn)是CD中點(diǎn),求證:∠1=∠2ABCDEF213.已知:AC平分∠BAD,CE⊥AB,∠B+∠D=180°,求證:AE=AD+BE4.如圖,四邊形ABCD中
2025-03-24 07:41
2025-06-19 23:06