urgent pour demain svp

a) A DAC = (DA*DC)/2
   = (6*8)/2 = 24cm²

b) V1 MADC = 1/3(A base*h)
 = 1/3(24*7)
 = 56cm^3

c) GM = CG-CM 
           = 12-7
           = 5cm

V2 MEFGH =
 1/3 (FE*EH*MG) =
(8*6*5)/3 = 80cm^3

d) non, il restera 80-56 = 24cm^3
( V MEFGH - V MADC)