The two sides of an isosceles triangle are 3cm and 8cm long respectively, what is the perimeter of the isosceles triangle?
一个等腰三角形的两条边分别长3cm和8cm，这个等腰三角形的周长是多少．
<gadget id="calculator">8 + 8 + 3</gadget>
<output>19</output>

<result>19</result>