30-10-2022
Mathematics

Answered

On se place dans le repère orthonormé (0; 1; J).
1. Choisir les coordonnées des points A (......; .....) et B (.....; .....)
Attention: la droite (AB) ne doit pas être parallèle aux axes du repère !
2. On donne le point H de coordonnées: H (XA; YB) = (... ...; ... ...)
3. Placer H dans le repère (0; 1;J).
4. Que dire du triangle ABH? Le démontrer.
5. En déduire la longueur AB et donner la valeur exacte du résultat.
6. Calculer la mesure de l'angle ABH au dixième de degré près.

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