YOU NEED YOUR CARNEGIE NOTEBOOK TODAY GET AUTOMATICITY
YOU NEED YOUR CARNEGIE NOTEBOOK TODAY GET AUTOMATICITY READY TURN IN ANY HOMEWORK TO THE DRAWER 1
LEARNING TARGET 4 2 I can solve problems using Area and Circumference of a Circle.
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 3
CARNEGIE 12. 1 # 1 -3 4
ARE THE CIRCLES CONGRUENT? A E B D C 5
If the both circles have the SAME RADIUS or the SAME DIAMETER then they are CONGRUENT. 6
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. 3. 14. 7
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 8
CARNEGIE 12. 2 # 15 The circumference of a circle is 112. 8 mm. Calculate the diameter of the circle using the circumference formula. Let π = 3. 14 Circumference= π * Diameter 9
EXIT SLIP Line 1 DRAW THIS CIRCLE B D A C E Line 2 Which line is the radius and which is the diameter? What is the formula for finding the Circumference of a Circle? 10
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