Geometry Problem 1228: Three Tangent Circles, Midpoint, Major Arc, Common Tangent Line, Square

Geometry Problem. Post your solution in the comment box below.
Level: Mathematics Education, High School, Honors Geometry, College.

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Problem 301: Tangents to a circle, Secants, Major Arc

Proposed Problem
Click the figure below to see the complete problem 301 about Tangents to a circle, Secants, Major Arc.


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Complete Problem 301
Collection of Geometry Problems

Level: High School, SAT Prep, College geometry