What is the supplementary angle of 129 degrees? Here we will define the supplementary angle of 129 degrees, show you how to calculate the supplementary angle of 129 degrees, and even illustrate the supplementary angle of 129 degrees (129°) so you have a solid understanding of what it means.
The supplementary angle of 129 degrees, also known as the supplement angle of 129 degrees, is the angle that when added to 129 results in a sum of 180. Therefore, to calculate the supplement angle of 129 degrees, we subtract 129 from 180. Here is the formula, the math, and the answer:
180 - angle = supplement angle
180 - 129 = 51
51 degrees
129 degrees plus the supplementary angle of 129 degrees equals 180 degrees, which means that together they will make a straight line.
The illustration below shows 129 degrees colored in red and the supplementary angle of 129 degrees, which is 51 degrees, colored in green.
As you can see from the illustration above, 129 degrees and 51 degrees form a straight line together. This proves that the two angles, 129 degrees and 51 degrees, are supplementary angles.
Supplementary Angle Calculator
Let us calculate another supplementary angle for you!
Supplementary angle of 129.1 degrees
Here is another trigonometry math problem that we have illustrated and calculated the answer to.