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Răspuns :

aria ADM=ADXDM/2       DM=6:2=3 
   9=6X3/2
   9=18/2
   9=9 ⇒latura patratului =6 cm
AM²=AD²+DM²=6²+3²=36+9=45
AM=√45=3√5       
AM=MB=3√5
perimetru ABM=AB+AM+MB=6+3√5+3√5=6+6√5
 
DM=MC M-mijloculDC
BT=TC  T-mijloculBC   ⇒DM=BT      MT=DB/2
DM=BT=6/2=3 cm
⇒BTMD -trapez isoscel