Радиус R = 16.
а) Хорда AB = 2 * R * sin(∠AOB / 2) = 2 * 16 * sin(60°/2) = 32 * sin(30°) = 32 * 0.5 = 16.
б) Хорда AB = 2 * R * sin(∠AOB / 2) = 2 * 16 * sin(90°/2) = 32 * sin(45°) = 32 * (√2 / 2) = 16√2.
в) Хорда AB = 2 * R * sin(∠AOB / 2) = 2 * 16 * sin(180°/2) = 32 * sin(90°) = 32 * 1 = 32.