Identify the supplementary pair of angles in each of the following,
$i) 20 ° a n d 110 ° i i) 135 ° a n d 45 ° i i i) 100 ° a n d 79 ° i v) 89 ° a n d 91 °$

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Solution

Supplementary angle is termed as the sum of two angles are equal to one right angle i.e. $180 ° .$
$i) 20 ° + 110 ° = 130 ° \neq 180 °$ hence these are not supplementary angles.
$i i) 135 ° + 45 ° = 180 °$ hence these are supplementary angles.
$i i i) 100 ° + 79 ° = 179 ° \neq 180 °$ hence these are not supplementary angles.
$i v) 89 ° + 91 ° = 180 °$ hence these are supplementary angles.

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Question 3 (v)
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