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Mathematics
Grade9
Easy
Question
Which pair of the following angles are not supplementary?
Hint:
If the sum of the measures of two angles is 180 degrees , the angles are called supplementary angles.
The correct answer is:
If the sum of the measures of two angles is 180 degrees , the angles are called supplementary angles. 120° + 90° = 210° ≠ 180°. Therefore, 120° and 90° are not supplementary angles.