Answer:
True
Explanation:
Supplementary angles are those that sum up to 180 degrees. A square is a polygon with all its angles measuring 90 degrees. This means that opposite angles are both 90 degrees. And, since 90 + 90 = 180, that means that a square's opposite angles are supplementary.
Hope this helps!
Supplementary angles add up to 180
All angles in a square are 90.
Opposite angles add up to 180°
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