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If corresponding sides of △ABC and △A’B’C’ above are proportional, what is y in terms of x ?
If corresponding sides of △ABC and △A’B’C’ above are proportional, what is y in terms of x ?
admin
2009-05-19
97
问题
If corresponding sides of △ABC and △A’B’C’ above are proportional, what is y in terms of x ?
选项
A、3x/7
B、6x/7
C、2x
D、7x/3
E、14x/3
答案
D
解析
如果△ABC与△A’B’C’的对应边成比例,那么y用x来表示是多少?
解:本题的正确答案为(D)。因为△ABC和△A’B’C’的对应边成比例,所以有:y/x=BC/B’C’=AB/A’B’=7/3 → y=7x/3
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