Mathematics
8 Online
OpenStudy (anonymous):
more pictures. please help and show all steps
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OpenStudy (anonymous):
please help with all of them
OpenStudy (anonymous):
22-26
OpenStudy (anonymous):
or i mean 27
OpenStudy (anonymous):
22-27
OpenStudy (anonymous):
Let's start with number 22.
You have a circle with radius 6. Do you know how to find it's total diameter?
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OpenStudy (anonymous):
yeah the diameter is 12
OpenStudy (anonymous):
im not suree
OpenStudy (anonymous):
Oh you know what, I messed up. I meant to ask if you know how to find the circumference.
OpenStudy (anonymous):
The diameter is 12, like you said. Haha my bad.
OpenStudy (anonymous):
thas ok
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OpenStudy (anonymous):
it would be pi 6^2
OpenStudy (anonymous):
but then you would take 1/2 of that right?
OpenStudy (anonymous):
That's the area.
OpenStudy (anonymous):
oh 2pir
OpenStudy (anonymous):
Yes. So pi*12.
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OpenStudy (anonymous):
Now, isn't the arc RS just part of that total circumference?
OpenStudy (anonymous):
yeah
OpenStudy (anonymous):
How much of the total circumference is that arc?
OpenStudy (anonymous):
i dont know..
OpenStudy (anonymous):
almost 1/2
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OpenStudy (anonymous):
Riiight. It's measure is 150 degrees. And how much is the total circle's measure?
OpenStudy (anonymous):
360
OpenStudy (anonymous):
so now what?
OpenStudy (anonymous):
So the arc is 150 degrees of the total 360, so what fraction of the total circumference is it?
OpenStudy (anonymous):
150/360
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OpenStudy (anonymous):
Yup =) And the total circumference, as you said is 12pi, so what is the length of the arc?
OpenStudy (anonymous):
5 pi
OpenStudy (anonymous):
You nailed it.
OpenStudy (anonymous):
thank you :) can you help with the next ones
OpenStudy (anonymous):
Sorry, no. My Starcraft 2 install just finished.
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OpenStudy (anonymous):
okkkkkk. thanks