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= 8^2
=64
L EFGH = p x l
= 10 x 6
= 60
L tot = 64 + 60 = 124
L daerah yg tdk d arsir = 68
L daerah yg d arsir= Ltot - Ldaerh yg tdk darsir
L daerah yg d arsir =124-68= 56 cm²