Réponses

2012-10-09T20:27:41+02:00

1)

a)

P1 = 3 + x + 3 + x = 6 + 2x

P2 = 2 + (6-x) + 2 + (6-x) = 4 + 12 - 2x = 16 - 2x

 

b)

P1 = P2 pour :

6 + 2x = 16 - 2x

4x = 16 - 6

x = 10/4

x = 5/2

x = 2,5 cm

 

2)

a)

S1 = 3x

S2 = 2(6-x) = 12 - 2x

 

b)

S1 = S2 pour :

3x = 12 - 2x

5x = 12

x = 12/5

x = 2,4 cm

 

En espérant t'avoir aidé.