The apex angle of an isosceles triangle is (10/13) of a base angle, so what is the degree of a base angle of this isosceles triangle
一个等腰三角形的顶角度数是一个底角度数的(10/13)，那么这个等腰三角形的一个底角的度数是多少°
<gadget id="calculator">10 / 13</gadget>
<output>10/13 = around 0.769231</output>

<gadget id="calculator">1 + 1 + (10/13)</gadget>
<output>36/13 = around 2.769231</output>

<gadget id="calculator">180 / (36/13)</gadget>
<output>65</output>

<result>65</result>