Pi can't be exactly expressed as a fraction, or as a decimal. It is approximately equal to 3.14159265, but for many practical calculations you may want to round it to 3.14, or to 3.1416.
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pi^2
Pi is approximately equal to 3.141592652389793238462.
pi is equal to 3.14
No. Pi is approximately 3.14 and since .75 is not equal to 3.14, .75 is not equal to 3.14.
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