AMC10 2000 A
AMC10 2000 A · Q10
AMC10 2000 A · Q10. It mainly tests Triangles (properties).
The sides of a triangle with positive area have lengths 4, 6, and x. The sides of a second triangle with positive area have lengths 4, 6, and y. What is the smallest positive number that is not a possible value of |x - y|?
一个具有正面积的三角形的边长为 4、6 和 $x$。第二个具有正面积的三角形的边长为 4、6 和 $y$。最小的不可能是 $|x - y|$ 值的正数是多少?
(A)
2
2
(B)
4
4
(C)
6
6
(D)
8
8
(E)
10
10
Answer
Correct choice: (D)
正确答案:(D)
Solution
Answer (D): By the Triangle Inequality, each of $x$ and $y$ can be any number strictly between 2 and 10, so $0 \le |x-y| < 8$. Therefore, the smallest positive number that is not a possible value of $|x-y|$ is $10-2=8$.
答案(D):根据三角不等式,$x$ 和 $y$ 都可以是严格介于 2 和 10 之间的任意数,因此 $0 \le |x-y| < 8$。所以,不可能作为 $|x-y|$ 的取值的最小正数是 $10-2=8$。
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