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= p x l
= 12cm X 6cm
= 72 cm
L bangun 2( persegi panjang )
= P x l
= 3 cm x 2 cm
= 6 cm
Luas bangun 3 ( persegi panjang )
= p x l
= 3cm x 2 cm
= 6 cm
L seluruhnya
= 72 cm (bangun 1) + 6 cm (bangun 2) + 6 cm (bangun 3 )
= 84 cm
*Jangan lupa setiap hasil diberi tanda persegi...
Semoga membantu...ツ