3850m is the area of the a circle whose radius of 7meaters
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r = 7
19.23
If a circle has a circumference of 43.98 the radius is: 7 (6.999).
Area of a circle is (pi) x (radius)². So how do you want to approximate pi: We could choose 22/7, for example. So (15 in)² = 225 in², then multiply by 22/7 to get 4950/7 in², or 707 1/7 in².
Oh, dude, okay, so the area of a circle is πr^2, and the circumference is 2πr. Since the diameter is 7 yards, the radius is half of that, which is 3.5 yards. So, the area would be approximately 38.48 square yards, and the circumference would be around 21.99 yards. But hey, who's counting, right?