DSE Circle-ACT03B Relationship Between Chords and Angles at Centre

1. You can change the lengths of chords AB and CD by moving points A, B, C and D.[br]2. Observe the changes of the sizes of the angles at centre. Draw a conclusion if you can.
– MrWat@SFCC(HK)

Information: DSE Circle-ACT03B Relationship Between Chords and Angles at Centre