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s^2 = p × l
12^2 = y × 8
144 = y × 8
144 / 8 = y
18 = y
K. Persegi = K. Persegi Panjang
4s = (2p) + (2l)
4 × 12 = (2 × 18) + (2 × 8)
48 = 36 + 16
48 = 52
12 = 13
perbandingannya =
P. panjang : Persegi
13 : 12
Maaf kalo ada kesalahan ^_^