Lines AC and BC are tangent to circle O. Drag A and B to move the tangent lines. [br][br]1. When angle C is very large, [br] C is (close to or far from) circle O.[br] Major arc AB is (very large or very small or about a semicircle)[br] Minor arc AB is (very large or very small or about a semicircle)[br] A and B are (close to or far from) one another on circle O.[br][br]2. When angle C is very small, [br] C is (close to or far from) circle O.[br] Major arc AB is (very large or very small or about a semicircle)[br] Minor arc AB is (very large or very small or about a semicircle)[br] A and B are (close to or far from) one another on circle O.[br][br]3. Finish the sentence: When A and B form a diameter of circle O, angle C is equal to _____.[br][br]4. Make angle C equal to 90 degrees. What kind of angle is formed by AOB in this case?[br][br]5. Can you ever get major arc AB and angle C equal? minor arc AB and angle C?