Triangle Sum Theorem Calculator

According to the triangle angle sum theorem, the sum of all interior angles in a triangle equals 180°:

α + β + γ = 180°

For instance, if you wanted to determine the unknown angle α in a triangle, you would use the triangle angle sum theorem in the following way:

• α = 180° - γ - β (in degrees)
• α = π - γ - β (in radians)

You can also save time and trust the triangle sum theorem calculator to do your work!

Using a triangle sum theorem calculator is very straightforward! Just enter two known interior angles of a triangle in the tool. The calculator will tell you the value of a third angle according to the triangle interior angle sum theorem.

You can also change units of measurement for angles as per your convenience!

Do you think the triangle sum theorem calculator is helpful? Come along; we have other related calculators that will make your life easier:

• Triangle angle calculator;
• Classifying triangles calculator; and
• Interior and exterior triangle angles calculator.