A triangle and a parallelogram have the same area and the same base. The height of the triangle is 6 cm. What is the height of the parallelogram?
一个三角形和一个平行四边形面积相等，底也相等，三角形的高是6厘米，平行四边形的高是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>