1. Section 10.6 Equation of Circles
Chapter 10 Circles
Section 10.6
Equation of Circles
Write the equation of a circle.
Use the equation of a circle and its graph to solve problems.

2. Example 1 Writing Equations of Circles: Center and Radius
Example 2 Writing Equations of Circles: Center and Any Point
Example 3 Graphing A Circle
Example 4 Applying Graphs of Circles
Standard 21.0
Students prove and solve problems regarding relationships among chords, secants, tangents, inscribed angles, and inscribed and circumscribed polygons of circles. (Key)
Lesson 7 Contents

3. Write the equation of a circle.
Find the length of r
To write the equation of a circle need: 1. Radius 2. Center of Circle (h, k)

4. Write the equation of a circle.

5. Write the equation of a circle.

6. Write an equation for each circle. a. center at (0, –5), d 18
Write the equation of a circle.
Write an equation for each circle.
a. center at (0, –5), d 18
b. center at (7, 0), Goes through (27, 0)
Answer:
Answer:
Example 8-1c

7. Use the equation of a circle and its graph to solve problems.

8. Write the expression in standard form.
Use the equation of a circle and its graph to solve problems.
Graph
Write the expression in standard form.
The center is at (3, 0), and the radius is 4.
Draw a circle with radius 4, centered at (3, 0).
Example 8-3c

9. Answer: Use the equation of a circle and its graph to solve problems.
Example 8-3d

10. Use the equation of a circle and its graph to solve problems.
a. Graph
Answer:
Example 8-3e

11. Use the equation of a circle and its graph to solve problems.
b. Graph
Answer:
Example 8-3f

12. Use the equation of a circle and its graph to solve problems.

13. Use the equation of a circle and its graph to solve problems.

14. Use the equation of a circle and its graph to solve problems.

15. HW # 44 Pg even, 47, 49