Area of a Circle (Heath)
What is the area of the circle above?
r=1

A = ∏ r2

 

∏ = 3.14

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What is the area of the circle above?
r=2

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=10

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=5

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=20

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=15

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=30

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=4

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=3

A = ∏ r2

 

∏ = 3.14

What is the area of the circle above?
r=40

A = ∏ r2

 

∏ = 3.14

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