1) Find the missing angle.

Solution:

The sum of angles in a triangle is \(180^{\circ}\). In the given triangle, we have angles \(70^{\circ}\) and \(50^{\circ}\).

Missing angle = \(180^{\circ} - 70^{\circ} - 50^{\circ} = 180^{\circ} - 120^{\circ} = 60^{\circ}\).

Answer: The missing angle is 60°.