∠1 and ∠2 are two acute angles in a right triangle, ∠1=29 degrees, ∠2=how many degrees.
∠1与∠2是直角三角形中的两个锐角，∠1=29度，∠2=多少度．
<gadget id="calculator">90 - 29</gadget>
<output>61</output>

<result>61</result>