1. The problem asks for the size of the angle formed between two rays on a semicircular protractor. 2. The rays point to approximately 30° on the inner scale and 120° on the outer scale. 3. To find the angle between the rays, subtract the smaller angle from the larger angle: $$\text{Angle} = 120^\circ - 30^\circ$$ 4. Calculate the difference: $$\text{Angle} = 90^\circ$$ 5. Therefore, the size of the angle is 90 degrees.