A) \[{{70}^{o}}\]
B) \[{{180}^{o}}\]
C) \[{{90}^{o}}\]
D) \[{{150}^{o}}\]
Correct Answer: A
Solution :
Complementary angles add up to \[{{90}^{o}}\]. \[\angle PQR={{20}^{o}}\Rightarrow \] Its complementary angle is \[{{90}^{o}}-{{20}^{o}}={{70}^{o}}\]
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