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.
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