Barber Mcfarlane
08/18/2023 · Junior High School

Soit MNP un triangle tels que : \( \mathrm{MN}=6 \mathrm{~cm} ; \mathrm{NP}=4 \mathrm{~cm} \) et \( \mathrm{MP}=7 \mathrm{~cm} \). Construire les médianes de ce triangle

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Pour construire les médianes du triangle \( \triangle MNP \) avec les côtés \( \mathrm{MN} = 6 \) cm, \( \mathrm{NP} = 4 \) cm et \( \mathrm{MP} = 7 \) cm, suivez ces étapes : 1. **Tracer le triangle** : - Tracez le segment \( \mathrm{MN} \) de 6 cm. - Utilisez un compas pour tracer les arcs de rayon 7 cm et 4 cm centrés respectivement en \( M \) et \( N \). L'intersection est \( P \). - Reliez \( M \) à \( P \) et \( N \) à \( P \). 2. **Trouver les milieux des côtés** : - Tracer le milieu \( A \) de \( \mathrm{MN} \). - Tracer le milieu \( B \) de \( \mathrm{NP} \). - Tracer le milieu \( C \) de \( \mathrm{MP} \). 3. **Construire les médianes** : - Tracez \( \mathrm{MB} \), \( \mathrm{NC} \), et \( \mathrm{PA} \). Les médianes se croisent au centre de gravité du triangle.

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