The two sides of a triangle are 7cm and 12cm respectively, how many centimeters of iron wire is needed to enclose such a triangle.
一个三角形的两边分别是7cm，12cm，要围成这样一个三角形至少需要铁丝多少cm．
<gadget id="calculator">7 + 7 + 12</gadget>
<output>26</output>

<result>26</result>