One side of an isosceles triangle is 5 cm long and the other side is 4 cm long. What is the minimum length of rope needed to enclose this triangle?
一个等腰三角形的一条边是5厘米，另一条边长4厘米，围成这个三角形至少需要多少厘米长的绳子．
<gadget id="calculator">5 + 4 + 4</gadget>
<output>13</output>

<result>13</result>