The length of two adjacent sides of an isosceles triangle is 3 cm and 6 cm respectively, what is the perimeter of this isosceles triangle in cm
等腰三角形的两条邻边分别长3厘米、6厘米，这个等腰三角形的周长是多少厘米
<gadget id="calculator">6 + 6 + 3</gadget>
<output>15</output>

<result>15</result>