DSE Circle-ACT03A Relationship Between Arcs and Angles at Centre
- 主題：
- 圓
Activity:
In the figure, two sectors OAB and OCD are of different sizes. Observe the sizes of the subtended angles, the lengths of the corresponding arcs and chords.
1. Find the relation(s) between the angles at centre, lengths of arcs and lengths of chords.
2. Prove the above relation mathematically.