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Geometry
Circles, arc length and sector area
8
Mathematics
9th Grade
03/23/2011
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Cards

Term
Area of a Circle formula
 Definition

 

 

 

A=∏•r2
Term
What does the Circumference of a circle mean in words?
 Definition
The distance around the circle.
Term
Circumference of a Circle formula
 Definition

C=2•∏•r

 

or

 

C=∏•D
Term
Arc Length Formula in words
 Definition
Arc length is a fraction of the circumference
Term
Sector area in words
 Definition
Area of a sector is a fraction of the area of the circle
Term
Arc length formula
 Definition
Arc length=x⁄360•2∏r
Term
Sector area formula
 Definition
Sector area=x⁄360•∏•r2
Term
Area of a rectangle
 Definition
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