The lengths of the two sides of an isosceles triangle are 3 cm and 8 cm, what is its perimeter in cm?
等腰三角形中两条边的长度是3厘米，8厘米，它的周长是多少厘米．
<gadget id="calculator">8 + 8 + 3</gadget>
<output>19</output>

<result>19</result>