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What is the ratio of the smaller circle's area to the larger circle's area?

Give your answer in fully simplified form. It should look like "x:y", where x and y are replaced by integers.
 

 Mar 21, 2019
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Pick a number for the smaller circle diameter.....say 2 units....the larger circle diameter is 4

 

Area of circle = pi r^2

 

Smaller/Larger  =   pi 1^2  / pi 2^2  =  1^2/2^2 =   1/4     or   1:4

 Mar 21, 2019
edited by ElectricPavlov  Mar 21, 2019

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