Definition:Angle of Intersection of Circles
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Definition
Let $\CC$ and $\CC'$ be circles whose centers are at $C$ and $C'$ respectively.
Let $\CC$ and $\CC'$ intersect at $A$ and $B$.
The angle of intersection of $\CC$ and $\CC'$ is the angle between the tangents at the point of intersection.
Of the two angles formed by the tangents, the angle taken is between:
and:
Also see
- Angle of Intersection of Circles equals Angle between Radii
- Angle of Intersection of Circles is Equal at Both Points
Sources
- 1933: D.M.Y. Sommerville: Analytical Conics (3rd ed.) ... (previous) ... (next): Chapter $\text {III}$. The Circle: $15$. Angle of intersection of two circles