What is the supplementary angle of 123 degrees? Here we will define the supplementary angle of 123 degrees, show you how to calculate the supplementary angle of 123 degrees, and even illustrate the supplementary angle of 123 degrees (123°) so you have a solid understanding of what it means.
The supplementary angle of 123 degrees, also known as the supplement angle of 123 degrees, is the angle that when added to 123 results in a sum of 180. Therefore, to calculate the supplement angle of 123 degrees, we subtract 123 from 180. Here is the formula, the math, and the answer:
180 - angle = supplement angle
180 - 123 = 57
57 degrees
123 degrees plus the supplementary angle of 123 degrees equals 180 degrees, which means that together they will make a straight line.
The illustration below shows 123 degrees colored in red and the supplementary angle of 123 degrees, which is 57 degrees, colored in green.
As you can see from the illustration above, 123 degrees and 57 degrees form a straight line together. This proves that the two angles, 123 degrees and 57 degrees, are supplementary angles.
Supplementary Angle Calculator
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Supplementary angle of 123.1 degrees
Here is another trigonometry math problem that we have illustrated and calculated the answer to.