Equations For Four Circles
Let x : y : z be a variable point in trilinear coordinates, and let u = cos2(A/2), v = cos2(B/2), w = cos2(C/2). The four circles described above are given by these equations:
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- Incircle:
- A-excircle:
- B-excircle:
- C-excircle:
Read more about this topic: Incircle And Excircles Of A Triangle
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