1. YOU NEED YOUR CARNEGIE NOTEBOOK TODAY GET AUTOMATICITY READY TURN IN ANY HOMEWORK TO THE DRAWER

2. I can solve problems using Area and Circumference of a Circle.
Learning Target 4
I can solve problems using Area and Circumference of a Circle.

3. KEY TERMS
Circle = collection of points all the same distance from one point called the center of a circle.
Radius= line segment made by connecting the center of the circle to a point on the circle
Diameter= line segment formed by connecting two points on a circle where the line goes through the center of circle.
Diameter= 2 * Radius

4. Carnegie 12.1 # 1-3

5. Are the Circles congruent?B D C

6. If the both circles have the SAME RADIUS or the SAME DIAMETER then they are CONGRUENT.

7. Circumference of a circle
It is the distance around the edge of the circle or the outside of a circle.
It is like taking the perimeter of a circle.
Circumference = π * Diameter
Π (Pi) = the number you get when you divide the circumference of a circle by its diameter, apprx

8. The radius of a circle is 8.2 cm.
Carnegie 12.2 # 8
The radius of a circle is 8.2 cm.
Calculate the circumference of the circle using the circumference formula. Let π = 3.14
Circumference = π * Diameter
Circumference = π * 2* Radius

9. Carnegie 12.2 # 15
The circumference of a circle is mm. Calculate the diameter of the circle using the circumference formula. Let π = 3.14 Circumference= π * Diameter

10. EXIT SLIP DRAW THIS CIRCLE
Line 1
DRAW THIS CIRCLE
Which line is the radius and which is the diameter?
What is the formula for finding the Circumference of a Circle? B D A C
Line 2 E