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If we approximate π (pi) to be 3.14

and recognize that A=πr²

r² = A/π = 31.4/3.14 = 10

...so...

r = the square root of 10 (approximately 3.16)

With that said, we would still have to designate units to go with those numbers to make it meaningful.

If the area was about 31.4 square inches then the radius would be about 3.16 inches

If the are was about 31.4 square meters, then the radius would be about 3.16 meters

... and so on.

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6y ago
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Q: What is the radius of a circle with the area of 31.4?
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