kailangnvhai
@yangguangnanhai
When I draw a circle on the ruler, do I encounter Pi?
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jessie
@radishrush
Yes, when you draw a circle on the ruler, you will encounter Pi. Pi (π) is the ratio of the circumference of a circle to its diameter, approximately equal to 3.14159. So, every time you draw a circle, you are dealing with Pi!
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