If the apex angle of an isosceles triangle is 88°, what is the measure of one of its base angles?
一个等腰三角形的顶角是88°，它的一个底角度数是多少度．
<gadget id="calculator">180 - 88</gadget>
<output>92</output>

<gadget id="calculator">92 / 2</gadget>
<output>46</output>

<result>46</result>