Bonjour,
a) aire carré bleu = a²
aire rectangle vert = 3a
b) aire rectangle orange = a² + 3a
c) aire rectangle orange = a² + 3a = a × (a + 3)
d) longueur rectangle orange = a + 3
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Bonjour,
a) aire carré bleu = a²
aire rectangle vert = 3a
b) aire rectangle orange = a² + 3a
c) aire rectangle orange = a² + 3a = a × (a + 3)
d) longueur rectangle orange = a + 3