gabbyalicorn
  • gabbyalicorn
What is the circumference of a circle with a radius of 1.4 m?
Mathematics
schrodinger
  • schrodinger
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gabbyalicorn
  • gabbyalicorn
https://www.dropbox.com/s/bu5nbfitwpgm70q/Screenshot%202015-06-16%2022.21.23.png?dl=0
gabbyalicorn
  • gabbyalicorn
I'm guessing 2 x 3.14 x 1.4 ?
Michele_Laino
  • Michele_Laino
yes! what do you get?

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gabbyalicorn
  • gabbyalicorn
8.792
Michele_Laino
  • Michele_Laino
here we have to apply this formula: \[C = 2 \times \pi \times 1.4 = ...inches\]
gabbyalicorn
  • gabbyalicorn
I still have 8.792
Michele_Laino
  • Michele_Laino
no, please we have to do this computation: \[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;inches\]
Michele_Laino
  • Michele_Laino
oops.. \[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;meters\]
gabbyalicorn
  • gabbyalicorn
C= 8.792=8.792 = 8.792
Michele_Laino
  • Michele_Laino
here you have to multiply 2*1.4 only, so our answer is: \[C = 2 \times \pi \times 1.4 = 2 \times 1.4\pi = 2.8 \times \pi \;meters\] and we have finished
Michele_Laino
  • Michele_Laino
\[C = 2.8 \times \pi \;meters\]
gabbyalicorn
  • gabbyalicorn
2.8 x pi meters = 8.792 :I
Michele_Laino
  • Michele_Laino
you don't have to multiply 2.8*3.14
gabbyalicorn
  • gabbyalicorn
okay, without pi it would be 2.8 which would be D ;D
gabbyalicorn
  • gabbyalicorn
Thank you!
Michele_Laino
  • Michele_Laino
that's right! :)

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