How do you find the center of two concentric circles with just a straightedge? (self.math)

submitted 3 months ago by CanadaPlus to c/math

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The Wikipedia article on Steiner constructions mentions it, but doesn't explain it, and the source linked is a book I don't have. This has come up in a practical project.

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[-] CanadaPlus 1 points 3 months ago

Exactly. I could do a straightedge construction of 90 degrees, but not until I have a center, so I'm back at square one.

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this post was submitted on 25 Aug 2024

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