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Question -

In a parallelogram ABCD, if ∠B = 135°, determine the measure of its other angles.



Answer -

Since ABCD is a parallelogram with  .
Opposite angles of a parallelogram are equal.
Therefore,
 
Also, let  
Similarly,  
We know that the sum of the angles of a quadrilateral is  .
Hence the measure of other angles are  , and  .

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