Two angles of a triangle are \(50^{\circ}\) and \(80^{\circ}\) resp...

Two angles of a triangle are \(50^{\circ}\) and \(80^{\circ}\) respectively. Find the measurement of third angle of the triangle.

A. \(40^{\circ}\)

B. \(30^{\circ}\)

C. \(60^{\circ}\)

D. \(50^{\circ}\)