A) \[\angle Q+\angle R\]
B) \[90{}^\circ +\frac{1}{2}\,\,\angle Q\]
C) \[90{}^\circ -\frac{1}{2}\,\,\angle R\]
D) \[\frac{1}{2}\,\,(\angle Q-\angle R)\]
Correct Answer: D
Solution :
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