One side of an isosceles triangle is 3 cm long and the other side is 8 cm long. What is the minimum length of rope needed to enclose this isosceles triangle?
一个等腰三角形的一条边长3厘米，另一条边长8厘米，围成这个等腰三角形至少需要多少厘米长的绳子．
<gadget id="calculator">8 + 8 + 3</gadget>
<output>19</output>

<result>19</result>