1. Bell Ringer – 02/17/16 1.The diameter of Oc is 32 miles. What is its radius? 2.The diameter of a circular garden is 88.2 feet. Jenny walked from the edge of the garden to the center. How far did she walk? 3.The length of Amy’s bedroom is 3cm on a scale drawing. If the scale is 1cm:4.5ft, what is the actual length of Amy’s bedroom?

2. Circumference Wednesday, February 17, 2016 Student Objective – students will be able to calculate the circumference of a circle given the radius or the diameter.

3. Review of Basics Draw the DIAMETER and the RADIUS on the circle. What is the relationship between the diameter and the radius?

4. Circumference Circle, Circle Of a jar, Circumference equals 2πr Pi : Circumference :

5. Example 1 The diameter of Oe is 19 inches. What is the circumference of Circle E?

6. Example 2 The radius of Og is 29.8 miles. What is the circumference of Circle G?

7. Example 3 The drawing shows two circles that share a common center point. What is the circumference of the outer circle? 4cm 3cm

8. Homework OpenED Due FRIDAY 1 mixed assignment – radius, diameter, circumference, area.