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5. Lines and Angles
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Q85 of 113 Page 128

Can two acute angles form a pair of supplementary angles? Give reason in support of your answer.

Two acute angles can never form a pair of supplementary angles.


Acute angles are always less than 900. So their sum will always be less than 2 × 900 = 1800.Hence they can never can form a pair of supplementary angles.


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83

In Fig. 5.43, write all the pairs of supplementary angles.

84

What is the type of other angle of a linear pair if

A. one of its angle is acute?


B. one of its angles is obtuse?


C. one of its angles is right?

86

Two lines AB and CD intersect at O (Fig. 5.44). Write all the pairs of adjacent angles by taking angles 1, 2, 3, and 4 only.

87

If the complement of an angle is 62°, then find its supplement.

Questions · 113
5. Lines and Angles
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