If the two sides of an isosceles triangle are 3 cm and 6 cm long, what is the length of the third side in cm?
一个等腰三角形的两条边长分别是3厘米、6厘米，第三条边的长度是多少厘米
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<result>6</result>