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sqrt(2)
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sqrt(2)
Edit: should refresh before posting. I'll add the working.
area = pi * r^2
if r = 1, area is pi
if you want to find r for twice the areathen
2 * pi = pi * r^2cancel pi from both sides
2 = r^2
sqrt(2) = r -
Area of a circle is pi×r². If you want circle A to have double the area of circle B you need a² to be 2×b². So a is √2×b as stated by the others.
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Not sure if answered yet, but it's around 1.41.
Tijmen
duncs
frankenbike
Tijs
@moocher
If I have a circle of radius 1 then what would the radius of a second circle need to be for it to have twice the area of the first?