It is known that ∠1 and ∠2 are two acute angles in a right triangle. If ∠1=40°, then ∠2=how many degrees
已知∠1和∠2是直角三角形中的两个锐角，如果∠1=40°，那么∠2=多少°
<gadget id="calculator">180 - 90 - 40</gadget>
<output>50</output>

<result>50</result>