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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
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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。
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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