Supplementary angles add up to 180 degrees
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Yes. 2 supplementary angles are angles that share a common side and add up to 180 degrees.
They are adjacent angles.
Adjacent angles.
Yes. If the two acute angles have their measures add up to 90 degrees, and both angles share one side that is common to each angle (they are adjacent), then their non-common sides will be perpendicular.
Adjacent angles.