Angles Outside a Circle: Lesson (Geometry Concepts)

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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:
www.ck12.org/ge...
2. Tangent Lines:
www.ck12.org/ge...
3. Arcs in Circles:
www.ck12.org/ge...
4. Chords in Circles:
www.ck12.org/ge...
5. Inscribed Angles in Circles:
www.ck12.org/ge...
6. Inscribed Quadrilaterals in Circles:
www.ck12.org/ge...
7. Angles On and Inside a Circle:
www.ck12.org/ge...
8. Angles Outside a Circle:
www.ck12.org/ge...
9. Segments from Chords:
www.ck12.org/ge...
10. Segments from Secants:
www.ck12.org/ge...
11. Segments from Secants and Tangents:
www.ck12.org/ge...
12. Circles in the Coordinate Plane:
www.ck12.org/ge...
Watch the whole series of CK-12's Geometry videos: • CK-12 Geometry Concepts