L = (2 x luas alas) + (luas selimut)
L = (2 x ½ x a x t) + (keliling alas x t)
L = (2 x ½ x 9 x 12) + ((9 + 12 + 15) x 20)
L= (108) + (720)
L= 828 cm²
klo bsa terbaik jdi yg terbaik dong :]
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Verified answer
L = (2 x luas alas) + (luas selimut)
L = (2 x ½ x a x t) + (keliling alas x t)
L = (2 x ½ x 9 x 12) + ((9 + 12 + 15) x 20)
L= (108) + (720)
L= 828 cm²
klo bsa terbaik jdi yg terbaik dong :]