This door contains supplementary angles that are not a linear pair. Supplementary angles are angles that add up to 180 degrees. A linear pair is a pair of adjacent angles that make a straight line. These angles are both right angles that are 90 degrees so they are supplementary. They are not on the same line and do not form a line so they are not a linear pair. Doors are used to separate rooms in houses.
I took this picture.
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