A triangle and a parallelogram have the same area and the same height. If the base of the triangle is 10 cm, what is the base of the parallelogram in cm?
一个三角形和一个平行四边形的面积相等，并且高也相等．如果三角形的底是10厘米，那么平行四边形的底是多少厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>