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= 1/2 x 22/7 x 28 x 28
= 11 x 4 x 28
= 1232
luas layang-layang= 1/2 x d1 x d2
= 1/2 x (7+7) x 28
= 14 x 14
= 196
luas yang diarsir = luas lingkaran - luas layang-layang
= 1232 - 196
= 1036