The ratio of the base angle to the apex angle of an isosceles triangle is 3:2, what is the apex angle in degrees?
一个等腰三角形的底角和顶角的比是3：2，它的顶角是多少度．
<gadget id="calculator">3 + 3 + 2</gadget>
<output>8</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">180 * (1/4)</gadget>
<output>45</output>

<result>45</result>