There is a European-style building. Its upper part is an isosceles triangle, one of its base angles is 34°, what is its top angle?
有一个欧式建筑物．它的上部是一个等腰三角形，其中的一个底角是34°，它的顶角是多少度？
<gadget id="calculator">34 * 2</gadget>
<output>68</output>

<gadget id="calculator">180 - 68</gadget>
<output>112</output>

<result>112</result>