A geometric figure and a triangle have a total of 9 corners, and a triangle has 3 corners. How many corners does a geometric figure have?
一个几何图形和三角形一共有9个角，三角形有3个角，则几何图形有几个角？
<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<result>6</result>