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24 = 24/4
= 6 m
Lbujursangkar = s^2
= 6^2
= 36
Lpersegipanjang = p x l
36 = p x 4
36/4 = p
9 = p
K R = 2(p+l)
= 2(6+4)
= 2(10)
= 20 m