A triangle and a parallelogram have the same area and the same base. The height of the parallelogram is 6 cm. What is the height of the triangle in cm?
一个三角形和一个平行四边形面积相等，底也相等，平行四边形的高是6cm，三角形的高为多少cm
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>