问题
选择题
已知△ABC∽△DEF，且AB：DE=1：2，则△ABC的面积与△DEF的面积之比为（ ）
A．1：2
B．1：4
C．2：1
D．4：1
答案
∵△ABC∽△DEF，且相似比为1：2，
∴其面积之比为1：4．故选B．
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已知△ABC∽△DEF，且AB：DE=1：2，则△ABC的面积与△DEF的面积之比为（ ）
A．1：2
B．1：4
C．2：1
D．4：1
∵△ABC∽△DEF，且相似比为1：2，
∴其面积之比为1：4．故选B．
| 补全对话。 | |
| J-Jim D---David J: Hi, David. How are you? D: 1_____ J: What are you going to do next weekend, David? D: 2_____ How about you? J: I don't know, either. D: 3_____ J: Good idea! But where shall we skate? D: The lake near our school is icy (结冰的) now. Let's skate there. J: All right. 4_____ D: Let's meet at the school gate. J: 5_____ D: Let's meet at nine o'clock. J: Great. See you next Saturday. D: See you.
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