1. 
Which of the following is a false statement?A diameter of a circle is also a chord of the same circle.

2. 
⊙O has a radius of 2 cm. What is the length of the longest chord of ⊙O you can possibly draw?4 cm

3. 
In the figure below, AC and BD are diameters of ⊙O. AB must be congruent to what other segment? CD

4. 
An angle is inscribed in a circle and intercepts an arc with measure 78°. What is the measure of the inscribed angle?39°

5. 
In the figure below, points A, B, and C are on ⊙O. Which of the following must be true? m∠AOB = 2 × m∠ACB

6. 
In the figure below, points A, B, and C are on the circle and AB = BC = CA. What is the measure of arc AB? 120°

7. 
In the figure below, points A, B, and C are on the circle and ∠ACB is a right angle. Which of the following statements must be true? AC > AB

8. 
Which of the following measures cannot be the measure of an inscribed angle?180°

9. 
An inscribed angle has a measure of 45°. What is the measure of the arc it intercepts?180°

10. 
An inscribed angle has a measure of 58°. What is the measure of the arc it intercepts?116°
