3 ms·
Pi ~ 3, but we also often need Pi^2, which is better approximated as 10. (I actually got into an argument about rounding Pi^2 to 10 once with a person who like
by dhimes 16y ago
Pi ~ 3, but we also often need Pi^2, which is better approximated as 10. (I actually got into an argument about rounding Pi^2 to 10 once with a person who liked to round Pi to 3 ...)
- bdhe 16y agoI remember using Pi^2 to be approximately g (the acceleration due to gravity near the earth's surface). This comes in real handy when simplifying the time period of a pendulum.
- dhimes 16y agoYep- and rounding g to 10 m/s^2 when there's no pi involved- so you can actually talk conversationally about free-fall because you can then do the math in your head.
- madcaptenor 16y agoPi is about 3. Pi^2 is about 10. But better than both of these approximations is Pi^2 + Pi = 13, which gives Pi = (-1 + sqrt(53))/2 = 3.1400... (It's too bad that the combination Pi^2 + Pi occurs basically never.)