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Panjang = 2h + h
= 3h
Lebar = h
Luas = p x l
= 3h x h
= 3h^2 cm^2
Luas bag.tak diitung
Luas = p x l
= h x 5
= 5h
Luas papan = Seluruh - tak diitung
= 3h^2 -5h cm^2
Note : ^ = pangkat