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Circles: Area and CircumferenceLoading...
By- Emily HauckLoading...
Table of Contents
Parts of a circle
- Area- Area enclosed by a circle
- Circumference- The linear distance around it.
- Radius- The distance from the center of the circle to any point on its circumference.
- Diameter- The length of the line through the center that touches two points on the edge of the circle.
- Pi (π )-The ratio of the circumference of any circle to the diameter of that circle (3.14).
- Circumference- The linear distance around it.
- Radius- The distance from the center of the circle to any point on its circumference.
- Diameter- The length of the line through the center that touches two points on the edge of the circle.
- Pi (π )-The ratio of the circumference of any circle to the diameter of that circle (3.14).
Finding the Circumference
You try finding the Circumference!
Formula:
C=πd or C=2πr
d=12
C=πd
C=π(12)
C=12π
C=π(12)
C=12π
r=2
C=2πr
C=2π(2)
C=4π
C=2π(2)
C=4π
listen how to do examples 1 and 2
You try finding the Circumference!
d=20
r=6
listen how to do examples 1 and 2
Finding the Area
Formula:
A=πr^2
You try finding the Area!
r=10
A=πr^2
A=π(10)^2
A=100π
A=π(10)^2
A=100π
r=6
A=πr^2
A=π(6)^2
A=36π
A=π(6)^2
A=36π
listen how to do examples 1 and 2