QuestionA disc of radius $30 \mathrm{~cm}$ has supports $20 \mathrm{~cm}$ tall. Find: (a) $\angle A O B$, (b) arc length $A C B$, (c) area percentage above line $A B$.

Studdy Solution
Calculate the percentage of the area above the line AB.
$$Percentage\, of\, area\, above\, AB = \frac{269.56}{2827.43} \cdot100 \approx9.53\%$$So, the angle AOB is approximately0.586 radians, the length of the arc ACB is approximately17.58 cm, and about9.53% of the disc's area lies above the line AB.