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√8²+8²
√64+64
√128
√16√8
√4√8
K = 32
persamaan :
2(p+l) = K
2((1+2l)+l) = 32
2(1+3l) = 32
2+6l = 32
6l = 32-2
6l = 30
l = 30/6
l = 5
p = 1+2l
p = 1+2(5)
p = 1+10
p = 11
maka lebarnya = 5cm dan panjangnya = 11cm
jadi L = p x l
L = 11 x 5
L = 55 cmpersegi