Réponses

2013-10-17T17:14:55+02:00
Dans le triangle ADB: angle D = 33 + 47 = 80° tg80° = AB/5 => AB = 75.tg80° = 425,346 
dans le triangle CBD: tg33 = BC/75 => BC = 75.tg33 = 48,7
AC = AB - BC = 376,64 soit 367m