1. SECTION 10.1
Circles and Circumference

2. CIRCLES AND CIRCUMFERENCE
 What are the parts of a circle?
 How can I solve problems using circumference?

3. CIRCLE
 Circle: The locus of all points in a plane equidistant
from a given point called the center of the circle.

4. PARTS OF A CIRCLE

L

5. PARTS OF A CIRCLE

M
L

6. PARTS OF A CIRCLE


7. PARTS OF A CIRCLE

H
G

8. EXAMPLES
1. Name the circle
2. Name a radius
3. Name a chord
4. Name a diameter

9. EXAMPLE


10. EXAMPLE


11. EXAMPLE


12. CIRCUMFERENCE


13. EXAMPLE
1. Find C if r = 13 inches
1. Exact=
2. Approximate =
2. Find C if d = 6 mm
3. Find d and r to the nearest hundredth if c = 65.4
feet.

14. HOMEWORK
 Page 526
 16 - 55

15. LESSON PLAN
 Intro
 Circles!
 Standards-
 Supplies – slides, whiteboard, note sheets
 Timing: Day 1 with notes and homework. A second
day will be review and a third with a quiz.
 Essential Questions- slides 2
 Input-slides 3-7 and 12
 Guided Practice – slides 8-11, 13
 Independent Practice – Book Work