- #1

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Btw, should I put this in the (Topology and) Geometry forums, or is it for more advanced geometry?

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- Thread starter dalcde
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- #1

- 166

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Btw, should I put this in the (Topology and) Geometry forums, or is it for more advanced geometry?

- #2

tiny-tim

Science Advisor

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hi dalcde!

hmm … angle bisectors …

hmm … angle bisectors …

hint: perpendiculars?

- #3

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Actually that's what I was starting with. You can put a circle around a quadrilateral (enclosing the quadrilateral inside) if and only if opposite angles of the quadrilateral are supplementary. I wanted to know under what conditions will it be possible to put a circle inside that is tangent to all of the side. (analogous to the incenter of a triangle) If having equal perpendiculars is what you meant, I would be going in circles, unless you have some ways to determine if you can put a circle inside, which would be really appreciated.

- #4

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Anyway, I've found the answer - Pitot Theorem. Thanks anyway.

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