What is the supplementary angle of 40 degrees? Here we will define the supplementary angle of 40 degrees, show you how to calculate the supplementary angle of 40 degrees, and even illustrate the supplementary angle of 40 degrees (40°) so you have a solid understanding of what it means.
The supplementary angle of 40 degrees, also known as the supplement angle of 40 degrees, is the angle that when added to 40 results in a sum of 180. Therefore, to calculate the supplement angle of 40 degrees, we subtract 40 from 180. Here is the formula, the math, and the answer:
180 - angle = supplement angle
180 - 40 = 140
140 degrees
40 degrees plus the supplementary angle of 40 degrees equals 180 degrees, which means that together they will make a straight line.
The illustration below shows 40 degrees colored in red and the supplementary angle of 40 degrees, which is 140 degrees, colored in green.
As you can see from the illustration above, 40 degrees and 140 degrees form a straight line together. This proves that the two angles, 40 degrees and 140 degrees, are supplementary angles.
Supplementary Angle Calculator
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Supplementary angle of 40.1 degrees
Here is another trigonometry math problem that we have illustrated and calculated the answer to.