2.55mm liposuction needle

Area = π*d square/4. The formula looks at substituting area. It is possible to derive d which is called (diameter), but because the proposition is uncertain in the exact number of digits of π and the number of reserved digits of the area is too small, and there is no restriction on the number of reserved digits of the final diameter. So it is not always possible to get, but in principle this error ,is allowed.