Bonjour;
périmètre = 2L +2l
1 dm = 10cm(10 -2,1-2,1)/2
= (10-4,2)/2
= 5,8/2
= 2,9
L= 2,9cm
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Bonjour;
périmètre = 2L +2l
1 dm = 10cm
(10 -2,1-2,1)/2
= (10-4,2)/2
= 5,8/2
= 2,9
L= 2,9cm