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?A24B26C28D29E30
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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