Explore, prove, and apply properties of circles that involve tangents.
3980_Tangents_of_circles_problem_example_1_.html
3982_Tangents_of_circles_problem_example_3_.html
3981_Tangents_of_circles_problem_example_2_.html
3979_Proof_Segments_tangent_to_circle_from_outside_point_are_congruent.html
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