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sisi peesegi = 3/2 × 16 = 24
keliling persegi = 24 × 4 = 96
⇔ 42 = 2 ( 13 + lebar)
⇔ lebar = 21 - 13
⇔ lebar = 8 cm
Panjang sisi persegi = 3/2 (8) = 12 cm
Keliling persegi= 4(12) = 48 cm