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DivineSolar (divinesolar):
With?
OpenStudy (anonymous):
finding pi
OpenStudy (anonymous):
in a circle
DivineSolar (divinesolar):
Is that the question?
OpenStudy (anonymous):
Circle a has a diameter of 7 inches a circumference of 21.98 inches and an area of 38.465
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OpenStudy (anonymous):
i need help understanding it
OpenStudy (anonymous):
use the formula for area and solve for the value of pi for each circle
OpenStudy (amorfide):
Area of a circle is
\[A=\pi(r)^{2}\]
Circumference of a circle is
\[C=\pi(d)\]
A is the area, r is radius and d is diameter
diameter=2r
you can work out pi from this
OpenStudy (amorfide):
also C is circumference
OpenStudy (anonymous):
ok
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OpenStudy (anonymous):
does radius 2 mean times 2 or no
OpenStudy (amorfide):
that little 2 at the top means squared
you can re write it to get
A=\[A=\pi(r)(r)\]
OpenStudy (anonymous):
what does squared mean
OpenStudy (amorfide):
the number multiplied by itself
OpenStudy (amorfide):
2r is radius multiplied by 2
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OpenStudy (anonymous):
oh ok
OpenStudy (anonymous):
divine you still here
DivineSolar (divinesolar):
Yes why?
OpenStudy (anonymous):
i could still use some help
DivineSolar (divinesolar):
Yes, But i do not usually do geometry questions.
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OpenStudy (anonymous):
oh ok then
DivineSolar (divinesolar):
Read my profile.
OpenStudy (anonymous):
I can help :)
OpenStudy (anonymous):
thanks
OpenStudy (anonymous):
What are you not understanding?
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OpenStudy (anonymous):
use the formula for area and solve for the value of pi for each circle
OpenStudy (anonymous):
Could you include the circles so I can better understand the problem?