Réponses

2014-10-23T11:29:41+02:00
Ex 1 :
3x10 = 30 mm soit 3 cm chaque coté

Ex 2 : 1)
A = ( 4/5 x 3/2 ) x [(1x2)/4- 3/4]
A = 4x3/5x2 x 2/4 - 3/4
A = 12/10 x -1/4
A = 12 x (-1) / 10 x 4
A = -12/40
A = -3/10