What is the supplementary angle of 90 degrees? Here we will define the supplementary angle of 90 degrees, show you how to calculate the supplementary angle of 90 degrees, and even illustrate the supplementary angle of 90 degrees (90°) so you have a solid understanding of what it means.
The supplementary angle of 90 degrees, also known as the supplement angle of 90 degrees, is the angle that when added to 90 results in a sum of 180. Therefore, to calculate the supplement angle of 90 degrees, we subtract 90 from 180. Here is the formula, the math, and the answer:
180 - angle = supplement angle
180 - 90 = 90
90 degrees
90 degrees plus the supplementary angle of 90 degrees equals 180 degrees, which means that together they will make a straight line.
The illustration below shows 90 degrees colored in red and the supplementary angle of 90 degrees, which is 90 degrees, colored in green.
As you can see from the illustration above, 90 degrees and 90 degrees form a straight line together. This proves that the two angles, 90 degrees and 90 degrees, are supplementary angles.
Supplementary Angle Calculator
Let us calculate another supplementary angle for you!
Supplementary angle of 90.1 degrees
Here is another trigonometry math problem that we have illustrated and calculated the answer to.