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p = 5/3*s= 5/3 * 12= 20
l = 3/4*s = 3/4 * 12 = 9
kll = 2*20+2*9
kll = 40+18
kll = 58
sorry klo salah, semoga membantu... :)
maka sisinya = 12 cm
Lalu...
Lebar PP = 3/4 . s
=3/4 . 12
= 9 cm
Panjang PP = 5/3 . s
=20 cm
Keliling = 2P + 2L
=18 + 40
=58 cm