If the lengths of the two sides of an isosceles triangle are 5 cm and 12 cm, what is the perimeter of the triangle in cm?
一个等腰三角形中两条边的长度分别是5厘米和12厘米，那么这个三角形的周长是多少厘米．
<gadget id="calculator">12 + 12 + 5</gadget>
<output>29</output>

<result>29</result>