Luas juring lingkaran yg berjari-jari 42cm, besudut pusat 60° dan harga π = 22 per 7 adalah....

L.juring = sdutpst/36p x L.lingkaran
L.Juring = 60/360 x 22/7 x 42 x 42
= 1/6 x 5544
= 924 cm^2

60°/360° × 22/7 ×42 ×42
= 1/6 × 22 × 6 × 42
= 22 × 42
= 924 cm²