The two sides of an isosceles triangle are 2cm and 5cm long respectively, how many centimeters of rope are needed to enclose this isosceles triangle?
一个等腰三角形的两条边分别长2cm和5cm，围成这个等腰三角形需要多少厘米的绳子．
<gadget id="calculator">5 + 5 + 2</gadget>
<output>12</output>

<result>12</result>