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luas = s x s
= 14 x 14
= 196
luas 1/2 lingkara
luas = 1/2 x phi x r²
= 1/2 x 22/7 x7 x7
= 11 x 7
= 77
luar arsir
luas = 196 - 77
= 119 cm²
jawabya 119 cm²