Question 1203921
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When the problem is worded this way, it is ambiguous. 


It is ambiguous, because it is unclear, who is "its complement": 


        is it the complement to the "an angle", or to the "supplement of an angle".



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<U>Comment from student</U> : The complement is a complement to the an angle



<U>My response</U> : How do you know, which interpretation to use ?


Because it is YOU who composes these "problems" ?



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Unhappy are those students who receive 
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;such assignments from their “teachers”.