The length of the base of an isosceles triangle is 5 cm and the length of the waist is 4 cm. What is the perimeter of the triangle?
一个等腰三角形底边长5厘米，腰长4厘米，这个三角形的周长是多少厘米？
<gadget id="calculator">5 + 4 + 4</gadget>
<output>13</output>

<result>13</result>