EVERYDAY CLARITY
Triangle Angle Calculator
What is the missing third angle of a triangle? Enter the values below to calculate the result.
Your result
C
degree
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| A (degree) | Enter a in degree; use the same basis as the other measurements. |
| B (degree) | Enter b in degree; use the same basis as the other measurements. |
Understanding your result
Read C (degree) in the units and model stated on this page. The formula C=180-A-B defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What is the missing third angle of a triangle?
What is the missing third angle of a triangle? Enter the values below to calculate the result.
Common uses
- What is the missing third angle of a triangle
How it works
C=180-A-B
Worked example
Enter A: 60 degree; B: 70 degree. Results: C: 50 degree.