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## Answers

if d=2.1 cm

then c= (22)(2.1)/7

c=6.6cm

if d=3.2cm

then, c=(22)(3.2)/7

c=10.06 cm rounded off.

if d=4.5cm

then, c=(22)(4.5)/7

c=14.143 cm rounded off

"22/7 is not exactly a pi" even if you ask your instructor..

22/7 is not the final answer so we can't round off it. because your answer might be wrong..

the pi in the formula in getting circumference is a constant so we cant replace with the other constant..