The base and height of a triangle are equal to the radius of a circle. If the area of the circle is 13.2cm**2 larger than the area of the triangle, what is the area of the triangle in cm**2?
一个三角形的底和高都与一个圆的半径相等，如果圆的面积比三角形的面积大13.2cm**2，三角形的面积是多少cm**2．
<gadget id="calculator">0.5 * 5</gadget>
<output>2.5</output>

<result>2.5</result>