triangle and a parallelogram have the same base and height. The area of the parallelogram is 12.5 square decimeters. What is the area of the triangle?
一个三角形与一个平行四边形等底等高的，平行四边形的面积是12.5平方分米，三角形的面积是多少平方分米．
<gadget id="calculator">12.5 / 2</gadget>
<output>6.25</output>

<result>6.25</result>