bushindo2

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About bushindo2

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  1. Simple geometry problem

    The geometrical proof for the property you mentioned can be derived from two equations for a circle and one equation for the shortest distance to a line. The solution for x0 can be simplified to the quadratic equation in post #4. I suppose it is relatively straightforward to plug x0 = 2r into that quadratic equation and show that 2r is always a solution. So, do I get the coveted bonanova gold star?