# Greatest angle

Calculate the greatest triangle angle with sides 197, 208, 299.

Result

α =  95.1 °

#### Solution:

$\Delta \ 197, 208, 299: \Delta \ 197, 208, 299 \ \\ \ \\ c^2 = a^2+b^2 - 2ab \cos \alpha \ \\ \ \\ \alpha = arccos \dfrac{ a^2 + b^2 -c^2}{ 2bc} = 95.1 ^\circ$

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#### Following knowledge from mathematics are needed to solve this word math problem:

Cosine rule uses trigonometric SAS triangle calculator. See also our trigonometric triangle calculator.

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