1) S = π r^2 = π 5.5^2 ≈ 95.03 см^22) S = π r^2 = π 10.8^2 ≈ 367.65 дм^23) S = π r^2 = π 15.2^2 ≈ 725.83 дм^2
1) S = π r^2 = π 5.5^2 ≈ 95.03 см^2
2) S = π r^2 = π 10.8^2 ≈ 367.65 дм^2
3) S = π r^2 = π 15.2^2 ≈ 725.83 дм^2