. Which of the following pairs of angles is not a pair of supplementary angles?
options
(a) 90°, 90°
(b) 32°, 58°
(c) 0°, 180°
(d) 76°, 104°
Answers
The right answer will be (b) 32°, 58° because their sum is 90° but a supplementry angle needs 180°.
Given : pair of angles a. 90°, 90° b. 32°, 58° (c) 0°, 180° d. 76°, 104°
To Find : Which of the following pairs of angles is not a pair of supplementary angles
Solution:
Two angles are called supplementary when their measures add up to 180 degrees.
a) 90°, 90°
=> 90° + 90° = 180°
pair of supplementary angles
b) 32°, 58°
=> 32°+ 58° = 90°
90° ≠ 180°
Hence not a pair of supplementary angles
(c) 0°, 180°
=> 0° + 180° = 180°
pair of supplementary angles
d) 76°, 104°
=> 76° + 104° = 180°
pair of supplementary angles
Hence b. 32°, 58° is not a pair of supplementary angles
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