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persegi 2x2 = 14x9
persegi 3x3 = 13x8
. . . .
. . . .
. . . .
persegi 9x9 = 7x2
persegi 10x10= 6x1
jadi total keseluruhannya
(15x10)+(14x9)+(13x8)+(12x7)+....+(6x1)=660 persegi