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Plane Geometry. Tangencies II (Radical Axis)

presentation helps explain tangency (Radical Axis) .

Content:

Concept of Power.
Radical Axis.
Radical Center.
Circles tangent to a line passing through two points (PPR).
Circles tangent to a circle passing through two points (PPC).
circle tangent to two lines through a point (RRP).
circle tangent to two lines and a circle (CRR).