If two triangles with sides of equal length are put together to form a parallelogram with a perimeter of 48, what is the length of the sides of these two triangles?
把两个边长都相等的三角形拼成一个周长为48的平行四边形，则这两个三角形的边长都等于多少．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<result>12</result>