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∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
”abc”&”1234” ”abc”@”1234” ”abc”$”1234” ”abc”#”1234”
∠D.=∠C,∠BAD=∠ABC ∠BAD=∠ABC,∠ABD=∠BAC BD=AC,∠BAD=∠ABC AD=BC,BD=AC
∠D.=∠C.,∠BAD=∠ABC ∠BAD=∠ABC,∠ABD=∠BAC BD=AC,∠BAD=∠ABC AD=BC,BD=AC
∠BDC=∠BCD ∠ABC=∠DAB ∠ADB=∠DAC ∠AOB=∠BOC
∠D.=∠C.,∠BAD=∠ABC ∠BAD=∠ABC,∠ABD=∠BAC BD=AC,∠BAD=∠ABC AD=BC,BD=AC
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
DE∥BC ∠AED=∠B AE:AD=AB:AC AE:DE=AC:BC
AC上,联结DE,那么下列条件中不能判断△ADE和△ABC相似的是( )
A.DE∥BC B.∠AED=∠B AE:AD=AB:AC AE:DE=AC:BC
ABC.dot abc.xls Word.wod myfile.doc
∠ ∠C的对边分别是a.b.c,下列条件中,能判断△ABC为直角三角形的是( )
A.a+b=c B.a:b:c=3:4:5 a=b=2c ∠A=∠B=∠C
∠DAC=∠BCA ∠DCB+∠ABC=180° ∠ABD=∠BDC ∠BAC=∠ACD
AC上,连接DE,那么下列条件中不能判断△ADE和△ABC相似的是( )A.DE∥BC B.∠AED=∠B AE:AD=AB:AC AE:DE=AC:BC
∠D.=∠C.,∠BAD=∠ABC ∠BAD=∠ABC,∠ABD=∠BAC BD=AC,∠BAD=∠ABC AD=BC,BD=AC
∠D.=∠C.,∠BAD=∠ABC ∠BAD=∠ABC,∠ABD=∠BAC BD=AC,∠BAD=∠ABC AD=BC,BD=AC
∠ ∠ 的对边分别是a、b、c,下列条件中,能判断△ABC为直角三角形的是( ) A.a+b=c B.a∶b∶c=3∶4∶5 C.a=b=2c ∠A.=∠B.=∠C.
甲、乙 甲、丙 乙、丙 乙
′ ′ ′中,有下列条件,①, ②, ③∠A.=∠A.′ ④∠C.=∠C.′, 如果从中任取两个条件组成一组,那么能判断△ABC∽△A.′B.′C.′的共有( )组 A. 1B. 2C. 3 4