The gemora is Eruvin 14a asks on the mishna how do we know that? Why don’t we measure it but the gemora asks Tosfas and the Rambam’s kashyeh, how do we know that since the value of PI is not known exactly, we can approximate it by 3?
The gemora is Eruvin 14a asks on the mishna how do we know that? Why don’t we measure it but the gemora asks Tosfas and the Rambam’s kashyeh, how do we know that since the value of PI is not known exactly, we can approximate it by 3?