Can someone check my answer? (gimme a sec I am lagging a lil)
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OpenStudy (openstudyrocks5*):
@k_lynn @BloomLocke367 @iGreen
OpenStudy (irishboy123):
nah
***2***πr
OpenStudy (openstudyrocks5*):
OpenStudy (k_lynn):
When you use the formula with a radius, the circumference formula is \[2\Pi r\]
OpenStudy (anonymous):
^^^
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OpenStudy (k_lynn):
Again, the \(\pi\) is 3.14. Multiply \[2 \times 3.14\times Radius\]
OpenStudy (openstudyrocks5*):
78.5
OpenStudy (k_lynn):
Right.
OpenStudy (texaschic101):
yes
OpenStudy (openstudyrocks5*):
Sorry I just didn't know where you got the 2 >.>
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OpenStudy (texaschic101):
learn these...
if you are looking for circumference of circle given radius, use C = 2 * pi * r
if you are given diameter use C = pi * d
OpenStudy (k_lynn):
That's the formula. It's something you'll have to memorize. When the question gives you the radius, you use this circumference formula: \[C=2\times \Pi \times Radius\]When they give you the diameter: \[C=\Pi \times Diameter\]THe two in the first formula is there because the radius is half the diameter, if you multiply by two, you can get the diameter.