Answer :
In the figure shown, 1 and 2 are; supplementary angles.
How to identify supplementary angles?
According to geometry in mathematics, we know very well that the sum of angles on a straight line is 180 degrees. We also know that two angle s are said to be supplementary angles when they sum up to 180 degrees.
Now, from the given image, we know that angle 1 and angle 2 form a straight line and as such they sum up to 180 degrees
This then tells us that they are both supplementary angles.
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