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题目内容 (请给出正确答案)
单选题
If the length of RS is 12 and the length of ST is 13, which of the following could be the length of RT?
A

24

B

26

C

28

D

29

E

30


参考答案

参考解析
解析:
根据三角形不等式公理,三角形的第三边大于两边之差,小于两边之和,又因为RS =12,ST=13,所以可得出13-12< RT< 13+12,1 < RT< 25,在这个范围之间的选项只有A,即24。
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