1. 
An isosceles right triangle inscribed in a circle. If the length of the two equal sides is 20 cm, find the radius of the circle. 

2. 
If a minor arc makes a central angle of 78°, what is the measure of the angle made by its complementary major arc? 

3. 
Explain the difference between a line segment containing the center of a circle with endpoints on the circle and a line segment that has one end point on the circle and another at its center. 


5. 
What is the distance between the endpoints of a semicircle? Explain how you got your answer. 

6. 
If an arc makes a central angle of 84°, is it a major or minor arc? Explain how you know. 

7. 
_{}P and _{}Q are congruent circles that intersect at C and D. If the radius is 15 cm and PQ = 8 cm, what is the area of quadrilateral PCQD? 



10. 
_{}P and _{}Q have radii 23 and 25. Given the distance between the center of the circles P and Q is 24, find the length of the common chord _{}.

