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Montrer qu'un triangle n'est pas rectangle : la méthode
Pauline Gabriac
Created on November 20, 2020
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Transcript
Montrer qu'un triangle n'est pas rectangle
4 cm
Dans le triangle ABC,
3 cm
6 cm
4 cm
le plus long côté est [AC].
3 cm
6 cm
AC ? BC + AB
AC = 6 = 36
BC + AB = 3 + 4 = 9 + 16 = 25
On remarque que
AC = BC + AB.
Donc d'après le théorème de Pythagore, ABC n'est pas un triangle rectangle.