Mathematics
18 Online
OpenStudy (cookiegirl):
Plz help with this question!
Estimate the circumference. Use 3.14 or to approximate π.
A. 44 cm
B. 22 cm
C. 88 cm
D. 11 cm
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OpenStudy (anonymous):
Circumference of a circle is given by:
\[\large Circumference = 2 \pi \cdot r\]
OpenStudy (anonymous):
do u hav the circle?
OpenStudy (anonymous):
If you are given with radius, then you are given \(r\) there..
OpenStudy (anonymous):
ya but i don't know what thee radius is...
OpenStudy (anonymous):
the*
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OpenStudy (cookiegirl):
@Saisuke<3 i dont have the circle
OpenStudy (anonymous):
But \(\pi\) is related to circle type things..
OpenStudy (anonymous):
mkay then do u hav the radius or the diameter?
OpenStudy (cookiegirl):
the radius is 7cm
OpenStudy (anonymous):
ok so if the radius is 7 then do u know the diameter?
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OpenStudy (anonymous):
See, you are given \(r\) here..
OpenStudy (cookiegirl):
no it doesn't show it
OpenStudy (anonymous):
|dw:1427561272922:dw|
OpenStudy (cookiegirl):
it looks somewhat like that
OpenStudy (anonymous):
and u need to find circumference
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OpenStudy (anonymous):
so do u know what the formula for circumference is
OpenStudy (cookiegirl):
it doesn't say......
this is so confusing :(
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
so its 2\(\pi\) r
OpenStudy (anonymous):
i can help!!
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OpenStudy (anonymous):
so basically, you do 2 times \(\pi\) times the radius
OpenStudy (anonymous):
ok so whats the radious?
OpenStudy (anonymous):
so first, you might want to do 2 times \(\pi\)
OpenStudy (anonymous):
do you know what that is?
OpenStudy (cookiegirl):
sort of...
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OpenStudy (anonymous):
ok so do the math and tell me what u get
OpenStudy (anonymous):
2•\(\pi\) = ?
OpenStudy (anonymous):
|dw:1427561858264:dw|