A triangle and a parallelogram have the same area and base. The height of the parallelogram is 3 cm. What is the height of the triangle in cm?
一个三角形与一个平行四边形的面积和底都相等，平行四边形的高是3厘米，三角形的高是多少厘米．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>