Supplementary angle
Find the other angle in a linear pair.
Inputs
Use the units shown—
Enter your values and select Calculate.
Formula & explanation
β = 180° − α
Variables & units
- Known angle
- ° · minimum 0, maximum 180
Worked example
The supplement of 65° is 115°.
Assumptions
Supplementary angles sum to 180°, not 90°.
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
Use the default input values to find the answer. The reset icon restores those values.
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