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Corrigé exercice 1.40b)_JtJ
Prouver que les pieds des perpendiculaires, issues de P(9 ; 5), aux côtés du triangle A(8 ; 8) B(0 ; 8) C(4 ; 0) sont alignés.
Mais existe-t-il d'autres positions du point P vérifiant la même propriété?