The height of a triangle is equal to the height and area of a parallelogram. If the base of the parallelogram is 2.6 cm, what is the base of the triangle in cm?
一个三角形的高和一个平行四边形的高相等，面积也相等，若平行四边形的底是2.6厘米，则三角形的底是多少厘米．
<gadget id="calculator">2.6 * 2</gadget>
<output>5.2</output>

<result>5.2</result>