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keliling= 4 × s
= 4 × 3x
= 12x
b.
luas persegi= s × s
= 3x × 3x
= 9x ²
c.
x= 3
keliling= 12x
= 12(3)
= 36 cm
luas= 9(3²)
= 9(9)
= 81 cm²
a. 4x
b. xpangkat2
c. - k = 4x =4 x 3 = 12
-L = xpangkat2 = 3 pangkat 2 = 9