What is the complementary angle of 78 degrees? Here we will define the complementary angle of 78 degrees, show you how to calculate the complementary angle of 78 degrees, and even illustrate the complementary angle of 78 degrees (78°) so you have a solid understanding of what it means.
The complementary angle of 78 degrees, also known as the complement angle of 78 degrees, is the angle that when added to 78 results in a sum of 90. Therefore, to calculate the complement angle of 78 degrees, we subtract 78 from 90. Here is the formula, the math, and the answer:
90 - angle = complement angle
90 - 78 = 12
12 degrees
78 degrees plus the complementary angle of 12 degrees equals 90 degrees, which means that together they will make an L-shaped 90-degree angle.
The illustration below shows 78 degrees colored in red and the complementary angle of 78 degrees, which is 12 degrees, colored in green.
As you can see from the illustration above, 78 degrees and 12 degrees form an L-shaped angle together. This proves that the two angles, 78 degrees and 12 degrees, are complementary angles.
Complementary Angle Calculator
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Complementary angle of 78.1 degrees
Here is another trigonometry math problem that we have illustrated and calculated the answer to.