1. 
Draw a circle and inscribe an obtuse triangle in the circle. 

2. 
How are circles defined and named? 


4. 
What is an inscribed polygon? 

5. 
If a minor arc makes a central angle of 79°, what is the measure of the angle made by its complementary major arc? 

6. 
_{}P and _{}Q are congruent circles that intersect at C and D. If the radius is 9 cm and PQ = 8 cm, what is the area of quadrilateral PCQD? 

7. 
An isosceles right triangle inscribed in a circle. If the length of the two equal sides is 15 cm, find the radius of the circle. 

8. 
What is the distance between the endpoints of a semicircle? Explain how you got your answer. 

9. 
What is wrong with the statement: "All radii are congruent."? 

10. 
Can any chord on a circle be a radius? 

11. 
Describe the three possible arcs that could be found on a circle. 

12. 
Why are three letters needed to name a major arc? 

13. 
Hannah is working on a sewing project. She has a circular piece of fabric, and needs to find the center. How can she do that? 

14. 
Eight points lie on the circumference of a circle. How many inscribed triangles can be constructed having any three of these points as vertices? 

15. 
The sum of all the arcs of a circle is how many degrees? 

