Relationship between Angles and Tangents of a Circle

1. What is the segment AC and BC called to the circle in the diagram below?
2. Move the slider up and down. What do you notice about the length of AC and BC?
3. Move the slider up and down. What do you notice about the sum of <BOA + <BCA?
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– Tuyetdong Phan-Yamada, Ishak_Hassan@SG

Information: Relationship between Angles and Tangents of a Circle