In an isosceles triangle, if the apex angle is 35°, what is the base angle?
在等腰三角形中，如果顶角是35°，则一个底角是多少°．
<gadget id="calculator">180 - 35</gadget>
<output>145</output>

<gadget id="calculator">145 / 2</gadget>
<output>145/2 = around 72.5</output>

<result>145/2 = around 72.5</result>