A triangle and a parallelogram have the same base and the same height. If the area of the parallelogram is 60 square centimeters, what is the area of the triangle in square centimeters?
一个三角形和一个平行四边形同底等高，如果平行四边形的面积是60平方厘米，那么三角形的面积是多少平方厘米．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<result>30</result>