L = 6² + 2² + 4² + 2² + 8² + 2²
= ( 12 + 4 ) + ( 8 + 4 ) + ( 16 + 4 )
= 16 + 12 + 20
= 48 cm² (D)
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»Penyelesaian«
L = 6² + 2² + 4² + 2² + 8² + 2²
= ( 12 + 4 ) + ( 8 + 4 ) + ( 16 + 4 )
= 16 + 12 + 20
= 48 cm² (D)