Mathematics
13 Online
OpenStudy (anonymous):
http://gyazo.com/5522f5e0847b4806f7ca54198bd11365
@confluxepic @gabgurl
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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
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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?
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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
\[(8 \times 8)+(15 \times 15)\]
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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.
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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):
\[A_{L}=\pi(8)\sqrt{(15)^{2}+(8)^{2}}\]
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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
\[8 \times 17\]
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OpenStudy (confluxepic):
@CoolGuy13
OpenStudy (anonymous):
136
OpenStudy (confluxepic):
Yes.
OpenStudy (confluxepic):
What is
\[136 \times \pi\]
rounded to the nearest hundredth.
OpenStudy (confluxepic):
@CoolGuy13
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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?
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OpenStudy (confluxepic):
Yes.
OpenStudy (anonymous):
Awesome, I'm almost done!