A triangle and a parallelogram have the same area and the same base. If the height of the parallelogram is 10 centimeters, what is the height of the triangle in centimeters?
一个三角形与一个平行四边形的面积相等，底也相等，若平行四边形的高是10厘米，则三角形的高是多少厘米
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>