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Mathematics 8 Online
OpenStudy (anonymous):

more pictures. please help and show all steps

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?

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

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.

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

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

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.

OpenStudy (anonymous):

okkkkkk. thanks

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