Here, p, q, r and s are the sides of the quadrilateral, T is half the perimeter, and A and C are two opposite angles. Bretschneider's formula works on any quadrilateral regardless of whether it is cyclic or not.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/44I5ftMLvvvKbQLP9RS1Ng== | 5.88129e-14 |
| dbr:Bretschneider's_formula | 5.88129e-14 |
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