Uploaded June 2017 | Updated September 2026, 1 week ago

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demonstrations.wolfram.com/ThreeTangentsToASphere

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Two lines, t and s, are tangent to a sphere at points A and B, respectively. Find the line r that is tangent to the sphere and intersects the other two tangents. Call the point of tangency X and let the intersection of r with t and s be M and N. Determi...

Contributed by: Izidor Hafner

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