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a. 5 . 5 =25 cm2
b. 9 .9 = 81 cm2
c. 15 . 15 = 225 cm2
d. 20 . 20 = 400 cm2
ket. = titik itu kali
a. 5 x 5 = 25
b. 81
c. 225
d. 400