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Bonsoir
L = 4/5 hm et l = 1/4 hm
Périmètre = 2(4/5) + 2(1/4)
= 8/5 + 2/4
= 32/20 + 10/20 = 42/20 = 21/2 = 10.5 hm
Aire = 4/5 x 1/4 = 4/20 = 1/5 = 0,2 hm²
L = 4/5 hm et l = 1/4 hm
Périmètre = 2(4/5) + 2(1/4)
= 8/5 + 2/4
= 32/20 + 10/20 = 42/20 = 21/2 = 10.5 hm
Aire = 4/5 x 1/4 = 4/20 = 1/5 = 0,2 hm²