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p417 12Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?

题目详情
p417 12
Five different points A,B,C,D and E lie on a line in that order.The length of AD is 4.5 and the length of BE is 3.5.If the length of CD is 2,what is one possible value for the length of BC?
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答案和解析
A B C D E,AD=4.5 BE=3.5 CD=2 AB+BC=AC=2.5 BC+DE=1.5
所以BC