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p x l
18 x 14 = 252 cm²
luas lingakaran
π x r²
22/7 x (14/2)²
22/7 x 7²
22/7 x 49
22 x 7 = 154
uas arsiran
luas persegi panjang - luas lingkaran
252 cm² - 154 cm²
98 cm²
luas lingkara= x 7 x 7=154
jadi luas daerah yang diarsir=252-154=98 cm^2