Steve B wrote:
Think of it this way;

10 feet by 10 feet = 100 square feet. OK.
20 by 20 = 400 sq. feet
30 by 30 = 900
50 by 50 = 2500
100 by 100 = 10,000
200 by 200 = 40,000
And 206.3 by 1206.3 = 43,560

Sorry, but doing that gives me a headache. Just by looking at the bottom
line, 40X 1206 is 48,000something, more than an acre. And 40 is one fifth
of 206 give or take. So, that answer is off by a factor of five or
thereabouts.
....

I presumed the 1206 was a typo and intended as another 206.3 given the
pattern above. Still, sqrt(43560) = 208.71..., though, not 206-something...

--