Pertama kita cari luas juring besar
L = 120/360 x πr²
= 1/3 x 22/7 x 21 x 21
= 462 cm²
Lalu cari luas juring kecil
= 1/3 x 22/7 x 14 x 14
= 205.33 cm²
Lalu kurangi
462 - 205.33 = 256.67 cm²
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Pertama kita cari luas juring besar
L = 120/360 x πr²
= 1/3 x 22/7 x 21 x 21
= 462 cm²
Lalu cari luas juring kecil
L = 120/360 x πr²
= 1/3 x 22/7 x 14 x 14
= 205.33 cm²
Lalu kurangi
462 - 205.33 = 256.67 cm²