Triangle Third Angle
Interior angles of a Euclidean triangle sum to one hundred eighty degrees. Two angles therefore determine the third.
Triangle Third Angle
Triangles · 2 inputs
How to use this calculator
- Enter first angle in degrees.
- Enter second angle in degrees.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Start with a dimensioned sketch and label the units beside every measurement. Distinguish the outer edge from an internal opening, and distinguish a radius from a diameter. A geometric model is most useful when the shape actually matches the assumptions in the formula.
The two entered angles must sum to less than one hundred eighty degrees.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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