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Lpersegi = 2 x s xs
= 2 x 10 x 10
= 200
Lpersegi panjang
L = p x l
= 30 x 5
= 150
jumlah = 150 + 200 = 350
gambar kedua
Lpersegi = s x s
= 5 x 5
= 25
Lpersegi panjang
L = p x l
= 30 x 5
= 150
jumlah = 150 + 25 = 175