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= √(3²+9²)
= √(9 + 81)
= √90
= √(9X10)
= 3√10
Luas alas + L.dinding
= s² + 1/2XaXt
= 6² + 1/2 X 6 X 3√10
= 36 + 1/2 X 6 X 3√10
= 36 + 9√10
Maaf, kalau salah..