Are the following pairs of angles complementary?
(i) 10° and 80°
(ii) 37° 28′ and 52° 33’

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Solution

(i) 10° and 80°
Yes, they are complementary angles as their sum = $10^{o} + 80^{o} = 90^{o}$
(ii) 37° 28′ and 52° 33′
No, they are not complementary angles as their sum is not equal to $90^{o}$
37° 28′ + 52° 33′ = $90^{\circ}$ 1'

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Identify which of the following pairs of angles are complementary and which are supplementary:
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Question 80

In the given figure OR $⊥$ OP,

(i) Name all the pairs of adjacent angles.
(ii) Name all the pairs fo complementary angles.

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