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题型:单选题 题类:常考题 难易度:普通
(1)若∠A=∠A1 , ∠C=∠C1 , 则△ABC∽△A1B1C1;
(2)若AC:A1C1=CB:C1B1 , ∠C=∠C1 , 则△ABC∽△A1B1C1;
(3)若AB=kA1B1 , AC=kA1C1 , (k≠0),∠A=∠A1 , 则△ABC∽△A1B1C1;
(4)若S△ABC=S△A1B1C1 , 则△ABC∽△A1B1C1 .
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