Dad bought an isosceles triangle kite for Xiaohong. Its top angle is 70 degrees. How many degrees is one of its bottom angles?
爸爸给小红买了一个等腰三角形的风筝，它的顶角是70度，它的一个底角是多少度？
<gadget id="calculator">180 - 70</gadget>
<output>110</output>

<gadget id="calculator">110 / 2</gadget>
<output>55</output>

<result>55</result>