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Mathematics, 20.03.2021 23:00 lorenzo1beaton

Construire un triangle ABC rectangle en B tel que AB = 9 cm et BC = 6 cm. Placer les points I et J milieux respectifs des côtés [AB] et [AC].
Construire le point K symétrique de I par rapport à J.
Montrer que le quadrilatère AICK est un parallelogramme.
En déduire la longueur CK.
Démontrer que les droites (IJ) et (BC) sont parallèles.
Démontrer que le quadrilatère BIKC est un parallélogramme, puis un rectangle​

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