∠1 and ∠2 are two acute angles of a right triangle, ∠1=38 degrees, ∠2=how many degrees.
∠1、∠2是直角三角形的二个锐角，∠1=38度，∠2=多少度．
<gadget id="calculator">180 - 90 - 38</gadget>
<output>52</output>

<result>52</result>