7th Class Mathematics Lines and Angles Question Bank Lines and Angles

  • question_answer 18) What is the complementary angle of \[{{20}^{o}}\]?

    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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