Tag Archives: circle-line tangent

Find the tangent lines between two circles in C#

This example shows how you can find the tangent lines between two circles. Depending on how the circles are arranged, they can have 0, 2, or 4 tangent lines. If the circles don’t intersect, as on the left in Figure … Continue reading

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Find the tangent lines between a point and a circle in C#

Finding the tangent lines between a point and a circle isn’t too hard if you’re familiar with the example Determine where two circles intersect in C#. Consider the figure on the right. R is the radius of the circle. You … Continue reading

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