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Geometry 20 Online
OpenStudy (anonymous):

Can someone help

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

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

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

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.

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?

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?

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