∠1 and ∠2 are two acute angles of a right triangle respectively. It is known that ∠1=52 degrees, and ∠1=how many degrees.
∠1和∠2分别是直角三角形的两个锐角，已知∠1=52度，∠1=多少度度．
<gadget id="calculator">90 - 52</gadget>
<output>38</output>

<result>38</result>