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Finding an angle measure of a triangle given two angles. Find the value of x.
a / sin (α) = b / sin (β), so. β = arcsin [b * sin (α) / a] =. arcsin [14 in * sin (30°) / 9 in] =. arcsin [7/9] = 51.06°. From the theorem about sum of angles in a triangle, we calculate that γ = 180°- α - β = 180°- 30° - 51.06° = 98.94°. The triangle angle calculator finds the missing angles in triangle.
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