Question

Three sides of a triangle measure 10m, 12m, and 18m. Find the largest angle of the triangle to the nearest degree?

Answer 1

For a triangle with side lengths \(a,b,c\) and angles \(A, B, C\), where a is the side opposite of A, b is the side opposite of B .....
If we know the three lengths, as you do, then we get the angles by these equations.
\(A=\arccos\left(\frac{b^2+c^2-a^2}{2bc}\right) \\ B=\arccos\left(\frac{a^2+c^2-b^2}{2ac}\right) \\ C=180°-A-B\)