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Gambar 1
luas juring COD = Besar Sudut COD × πr2
= 72°/360° × 3,14 × 20 pangkat 2
= 72/360 × 3,14 × 400
= 24/120 × 1,256
= 6/30 × 1,256
= 1/5 × 1,256
= 251,2 cm2
Gambar 2
luas juring ROS = Besar sudut ROS × πr2
= 45/360 × 22/7 × 28 pangkat 2
= 1/8 × 22/7 × 784
= 1/8 × 2,464
= 308 cm2
Semoga Membantu