The shape of the four sides of the world-famous pyramid is isosceles triangle, the base angle of each isosceles triangle is about 64 degrees, and its top angle is about how many degrees.
举世闻名的金字塔四个侧面的形状都是等腰三角形，每个等腰三角形的底角大约都是64度，它的顶角大约是多少度．
<gadget id="calculator">64 * 2</gadget>
<output>128</output>

<gadget id="calculator">180 - 128</gadget>
<output>52</output>

<result>52</result>