Draw a quadrangle determined by the points $P, Q, R, S$ and name the sides and the three diagonal points $A, B,$ and $C$. Now draw the dual of this quadragle and name its sides and diagonals $a, b$, and $c$.
2026-03-28 12:14:37.1774700077
How to draw the dual of a quadrangle determined by four points?
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