Réponses

2014-05-23T13:32:44+02:00
Dans le triangle ART rectangle en R :
cos TÂR = AR / TA
cos 45° = AR / 7.5
AR = cos (45°) * 7.5
AR = 5.3 cm arrondi à 0.1 cm
2014-05-23T13:32:59+02:00
Bonjour

Cos (RAT) = AR/AT
Cos(45) = AR/7.5

AR = 7.5 x 0.707 = 5.3 cm