It is known that one acute angle of a triangle is 50° and the other acute angle is 70°. What is the third angle?
已知一个三角形的一个锐角是50°，另一个锐角是70°，第三个角是多少°．
<gadget id="calculator">180 - 50 - 70</gadget>
<output>60</output>

<result>60</result>