Find the size of the third angle in each triangle. The total sum of a triangle is 180°

$$Q = 180^\circ - 50^\circ$$ $$Q = 130^\circ$$

The third angle is $\boxed{Q = 130^\circ}$.

Note that the square symbol indicates a right angle, which is $90^\circ$.

$$90^\circ + 35^\circ = 125^\circ$$

$$\theta = 180^\circ - 125^\circ$$ $$\theta = 55^\circ$$

The third angle is $\boxed{\theta = 55^\circ}$.