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= 169 - 25
AC = akar dari 144
AC = 12
keliling = 5 + 12 + 13= 30
2) 2(3x+2) = 6x+4
2(x+1) = 2x+2
6x+4+2x+2 = 102
8x + 6 = 102
8x = 102 - 6
8x = 96
x = 12
lebar ==> x + 1
= 12 + 1
= 13