What is the supplementary angle of 21.2 degrees? Here we will define the supplementary angle of 21.2 degrees, show you how to calculate the supplementary angle of 21.2 degrees, and even illustrate the supplementary angle of 21.2 degrees (21.2°) so you have a solid understanding of what it means.
The supplementary angle of 21.2 degrees, also known as the supplement angle of 21.2 degrees, is the angle that when added to 21.2 results in a sum of 180. Therefore, to calculate the supplement angle of 21.2 degrees, we subtract 21.2 from 180. Here is the formula, the math, and the answer:
180 - angle = supplement angle
180 - 21.2 = 158.8
158.8 degrees
21.2 degrees plus the supplementary angle of 21.2 degrees equals 180 degrees, which means that together they will make a straight line.
The illustration below shows 21.2 degrees colored in red and the supplementary angle of 21.2 degrees, which is 158.8 degrees, colored in green.
As you can see from the illustration above, 21.2 degrees and 158.8 degrees form a straight line together. This proves that the two angles, 21.2 degrees and 158.8 degrees, are supplementary angles.
Supplementary Angle Calculator
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