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Mathematics 13 Online
OpenStudy (anonymous):

http://gyazo.com/5522f5e0847b4806f7ca54198bd11365 @confluxepic @gabgurl

OpenStudy (confluxepic):

Ok.

OpenStudy (confluxepic):

Since the diameter is 16, the radius would be 8.

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (confluxepic):

So what do you think the answer to part 1 is.

OpenStudy (anonymous):

oh hey

OpenStudy (anonymous):

Not sure :p

OpenStudy (confluxepic):

It is the radius. I just said it.

OpenStudy (confluxepic):

The radius is 8 because it is half of the diameter which is 16.

OpenStudy (anonymous):

Oh ok got it.

OpenStudy (anonymous):

Next one?

OpenStudy (confluxepic):

Basically we use Pythagoras Theorem. \[a^{2}+1b^{2}=c ^{2}\] In this problem it is \[8^{2}+15^{2}=c ^{2}\]

OpenStudy (confluxepic):

What is \[8 \times 8+15 \times 15\]

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (anonymous):

1185

OpenStudy (confluxepic):

I should actually say \[(8 \times 8)+(15 \times 15)\]

OpenStudy (confluxepic):

It would be \[(64)+(225)\]

OpenStudy (anonymous):

289

OpenStudy (confluxepic):

Yes. Now square root 289.

OpenStudy (confluxepic):

You would get 17.

OpenStudy (confluxepic):

So 17 would be your slant height.

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (anonymous):

Awesome thanks! And for part 3?

OpenStudy (confluxepic):

\[A_{L}=\pi(r)\sqrt{(h)^{2}+(r)^{2}}\]

OpenStudy (anonymous):

I can't read that. lol

OpenStudy (confluxepic):

\[A_{L}=\pi(8)\sqrt{(15)^{2}+(8)^{2}}\]

OpenStudy (confluxepic):

Remember we did \[(15)^{2}+(8)^{2}\] a while ago and we got 289. Then we square rooted it and got 17.

OpenStudy (confluxepic):

\[A_{L}=\pi(8)(17)\]

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (anonymous):

So what do i type in?

OpenStudy (confluxepic):

What is \[8 \times 17\]

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (anonymous):

136

OpenStudy (confluxepic):

Yes.

OpenStudy (confluxepic):

What is \[136 \times \pi\] rounded to the nearest hundredth.

OpenStudy (confluxepic):

@CoolGuy13

OpenStudy (anonymous):

427.04

OpenStudy (confluxepic):

Yes. But remember to round it. So it is 427.26.

OpenStudy (anonymous):

427.26 ? Are you sure?

OpenStudy (confluxepic):

Yes. You multiplied 136 with the rounded form of \[\pi\] If you multiply it without rounding \[\pi\] You will get 427.26.

OpenStudy (anonymous):

Ok so is that it?

OpenStudy (confluxepic):

Yes.

OpenStudy (anonymous):

Awesome, I'm almost done!

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