1. Today’s Date: 1/29/14 9.2 Circles Ch 9 Pt 2 Test on 2/27

2. Circle All points formed by measuring distance from center Do the distance formula: P(x, y) (h, k) Distance is the radius ( ) 2 General Eqtn. Of Circle:

3. Ex 1) State the Center & Radius and Graph the circle: Plot Center point first Plot points 5 units away from center: RIGHT, UP, LEFT, DOWN

4. T.O.O. Ex 4) Find the center, radius, & graph the circle: Ex 2) Find the center & radius of the circle: To get radius, take Ex 3) Find the center, radius of the circle:

5. Ex 5) Write the eqtn of the circle with center (3, –8) and radius 5 Ex 5) Write the eqtn of the circle with center (2, 6) and radius –2 Can you have a radius that’s neg? NOT a circle!!

6. Ex 6) Find the center & radius of the circle: What needs to be over here? r2r2 Complete the square!!

7. Ex 7) Find the center & radius of the circle: Complete the square TWICE!!

8. T.O.O. Ex 8) Find the center & radius of the circle: Not a circle!! Radius can’t be negative!

9. Homework #908 Pg. 410 1 – 23 odd