If the adjacent sides of an isosceles triangle are 7 cm and 3 cm respectively, what is the perimeter of the triangle in cm?
如果一个等腰三角形相邻的两边分别是7厘米和3厘米，那么这个三角形的周长是多少厘米．
<gadget id="calculator">7 + 7 + 3</gadget>
<output>17</output>

<result>17</result>