Supplementary Angle Calculator
A 'Supplementary Angle Calculator' is an online tool that finds and displays the supplementary angle of the given angle. Supplementary angles refer to the pair of angles that always sum up to 180°. These two angles are called supplements of each other.
What Is a Supplementary Angle Calculator?
In our Supplementary Angle calculator, you just need to enter the value of an angle that is less than 180°, to get its supplementary angle. Supplementary angles form a straight angle (180 degrees) when they are put together.
Supplementary Angle Calculator
NOTE: Please Enter Values from 0 to 180 degrees.
How to Use the Supplementary Angle Calculator?
Follow these steps to use the calculator:
 Step 1: Enter any angle which is less than 180°^{ }in the input box.
 Step 2: Click on "Calculate" to find its supplementary angle.
 Step 3: Click on "Reset" to clear the field and enter the new value.
What Is a Supplementary Angle?
Two angles are said to be supplementary angles if their sum is equal to 180°.
In other words, ∠1 and ∠2 are supplementary if ∠1 + ∠2 = 180°
Therefore, if we know one angle, then we can easily find its supplementary angle by subtracting the given angle from 180°.
Solved Examples on Supplementary Angle Calculator

Example 1:
Do the angles measuring 130° and 50° form a pair of supplementary angles?
Solution:
The sum of 130° and 50°^{ }is 180° .
So, the angles measuring 130° and 50° form a pair of supplementary angles.

Example 2:
Find the value of x such that x° and 75° form a pair of supplementary angles.
Solution:
If x° and 75° form a pair of supplementary angles, we will solve the equation x° + 75° = 180°^{ }to find the value of x.
x° + 75° = 180°
x° = 180°  75°
x° = 105°
Therefore, the value of x is 105°, which is the supplementary angle of 75°.
Now, use the calculator and find the supplementary angles for the following:
 135°
 23°
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