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Common Core Geometry.Unit #9.Lesson #5.Tangents to Circles

Common Core Geometry.Unit #9.Lesson #5.Tangents to CirclesУ вашего броузера проблема в совместимости с HTML5
In this lesson we look at what a tangent is and then examine and prove the fact that tangents are perpendicular to radii at the point of tangency. Various resulting problems are worked.
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