The Basics and Background Information
• The area of a circle is computed by multiplying Pi times the radius squared ( A =π r2 ).
• The circumference of a circle is found by multiplying Pi by the diameter or multiplying Pi by 2 times the radius (C =π d or C = 2π r ).
• The circumference of a circle is found by multiplying Pi by the diameter or multiplying Pi by 2 times the radius (C =π d or C = 2π r ).
Vocabulary and Things to Know:circle
circumference  "perimeter" of a circle radius distance from center to edge of circle diameter  entire distance across a circle going through the center pi  about 3.14 and circumference divided by diameter 
Be Able To:Find circumference
Find diameter Find area 
The topic: What is it and what will we learn?
Area and Circumference of CircleVideo not only shows how to calculate area and circumference, but it also incorporates composite shapes.

