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Pada gambar terlihat dari atas kebawah adalah jarijari lingkaran = 42
Luas putih = Luas juring
= 60°/360° × 22/7 × 42 × 42
= 1/6 × 22 × 6 × 42
= 924 cm2
L diarsir = 1764 - 924 = 840 cm2