CHAPTER 10 / ESSENTIAL GEOMETRY SKILLS 401
- What is the formula for the circumference of a circle?
- What is the formula for the area of a circle?
- What is a tangent line?
- What is the relationship between a tangent to a circle and the radius to the point of tangency?
- In the figure above, AB
––
is a tangent to circle C, AB=8, and AD=6. What is the circumference of circle C?- In the figure above, Pand Nare the centers of the circles and are 6 centimeters apart. What is the area of
the shaded region?
Concept Review 8: Circles
A C
D
B
8
(^6) r
r