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=1/4 X 113,04
= 28,26 L arsir = 28,26 - 18 = 10,26
b.L persegi = 28 X 28 = 784
L.1/2 ling. = 1/4 X 22/7 X 28 X 28
= 22 X 28 = 616
L.arsir = 784 - 616 = 168
c.L persegi = 14 X 14 = 256
L.ling = 22/7 X 7 X 7 = 154
L arsir = 256 - 154 = 102