Photorefractive keratectomy. Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses.
One acre is 43,660 square feet so 10 acres is 435,600 square feet. The area of a square is L 2 where L is the length of a side, so if the shape really is a square . L 2 = 435,600 square feet. so. L = Sqrt(435,600) = 660 feet. Penny
The Answer: Because an acre is a measure of area, not length, it is defined in square feet. An acre can be of any shapeâa rectangle, a triangle, a circle, or even a starâso long as its area is exactly 43,560 square feet.The most standard shape for an acre is one furlong by one chain, or 660 feet by 66 feet.To find the linear measurements of other rectangular acres, just divide 43,560 by the number of feet you want on one side.A square-shaped acre would then be about 208.7 by 208.7 feet (because 208.7 x 208.7 = ~43,560).An acre 100 feet wide would be 435.6 feet long (100 x 435.6 = 43,560) and an acre 1 foot wide would be 43,560 feet long. square-shaped acre would then be about 208.7 by 208.7 feet (because 208.7 x 208.7 = ~43,560). An acre 100 feet wide would be 435.6 feet long (100 x 435.6 = 43,560) and an acre 1 foot wide would be 43,560 feet long.