No it isn't.
Both your examples use real-world scenarios. The construction of a perfect circle (and the calculation of Pi) cannot be done in any real-world measurement. It's entirely invented. Pi does not exist in the real world. It does not exist in any circle you find in the universe. All circles in the universe have ratios which look similar to Pi, but once measured, turn out to not be Pi.
Pi only exists in mathematics, as an invented number for the ratio of a perfect circle.
Both your examples use real-world scenarios. The construction of a perfect circle (and the calculation of Pi) cannot be done in any real-world measurement. It's entirely invented. Pi does not exist in the real world. It does not exist in any circle you find in the universe. All circles in the universe have ratios which look similar to Pi, but once measured, turn out to not be Pi.
Pi only exists in mathematics, as an invented number for the ratio of a perfect circle.
