Angles Outside a Circle: Lesson (Geometry Concepts)

Discover more at www.ck12.org: http://www.ck12.org/geometry/Angles-O.... Here you'll learn how to calculate angles formed outside a circle by tangent and secant lines. This video gives more detail about the mathematical principles presented in Angles Outside a Circle. This is part of CK-12’s Geometry: Circles. See more at: 1. Parts of Circles: http://www.ck12.org/geometry/Parts-of... 2. Tangent Lines: http://www.ck12.org/geometry/Tangent-... 3. Arcs in Circles: http://www.ck12.org/geometry/Arcs-in-... 4. Chords in Circles: http://www.ck12.org/geometry/Chords-i... 5. Inscribed Angles in Circles: http://www.ck12.org/geometry/Inscribe... 6. Inscribed Quadrilaterals in Circles: http://www.ck12.org/geometry/Inscribe... 7. Angles On and Inside a Circle: http://www.ck12.org/geometry/Angles-O... 8. Angles Outside a Circle: http://www.ck12.org/geometry/Angles-O... 9. Segments from Chords: http://www.ck12.org/geometry/Segments... 10. Segments from Secants: http://www.ck12.org/geometry/Segments... 11. Segments from Secants and Tangents: http://www.ck12.org/geometry/Segments... 12. Circles in the Coordinate Plane: http://www.ck12.org/geometry/Circles-... Watch the whole series of CK-12's Geometry videos:    • CK-12 Geometry Concepts