bonjour
le 18
aire ABCD = long x larg = 4x12 = 48 cm²
aire triangle rectangle CDE = 1/2 x aire rectangle = 0,5x9x12 = 54 cm²
et donc aire totale = 48+54 = 102 cm²
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bonjour
le 18
aire ABCD = long x larg = 4x12 = 48 cm²
aire triangle rectangle CDE = 1/2 x aire rectangle = 0,5x9x12 = 54 cm²
et donc aire totale = 48+54 = 102 cm²