Exterior common tangent of two circles (given distance between centers and radius)

Formula

Exterior common tangent of two circles (given distance between centers and radius) formula
L
exterior common tangent
d
distance between two circle centers
R
radius of big circle
r
radius of small circle

Formula description

A line that is tangent to two circles in the same plane is a common tangent. A common tangent that does not intersect the segment joining the centers of two circles is an external common tangent.

Calculator (how to use calculator?)

Exterior common tangent of two circles (given distance between centers and radius) formula
d
R
r
L
Precision

Formula code

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References

  1. wikipedia: Circle.
  2. wikipedia: Tangent lines to circles.

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