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luas lingkaran = πr²
luas 1/4 lingkaran = 1/4πr²
= 1/4 . 22/7 . 14²
= 1/4 . 22/7 . 196cm²
= 154cm²
= x x 14²
= x 196
= 1/4 x 22 x 28
= 22 x 7 = 154cm²
Sorry kalo salah :D