Mathematics
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OpenStudy (anonymous):
Find the slant height of the right cone.
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OpenStudy (anonymous):
OpenStudy (anonymous):
First of all, do you see that the radius is 30?
OpenStudy (anonymous):
use a^2+b^2=c^2
OpenStudy (anonymous):
Yes, that makes D = 60.
OpenStudy (anonymous):
Yes. However, look.
|dw:1342747306692:dw|
Do you see how this happens and where it is in the cone?
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OpenStudy (anonymous):
Mandonut, you can't use pythagorean theorem for a cone, there's no edges. That's like using a = 1/2bh for a circle.
OpenStudy (anonymous):
Oh yeah, that's a right triangle by the way.
OpenStudy (anonymous):
@mandonut is actually right. There is a right triangle inside the cone.
OpenStudy (anonymous):
Oops, I'm terrible at math.
Sorry!
OpenStudy (anonymous):
|dw:1342747404648:dw| Do you see now?
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OpenStudy (anonymous):
Noooo :P
OpenStudy (anonymous):
Do you see how that is a right triangle inside the cone?
OpenStudy (anonymous):
Oh, yes, I thought you meant do I get the answer.
OpenStudy (anonymous):
Yeah. From there, use Pythagorean Theorem:
\[c^2 = a^2 + b^2\]\[c^2 = 40^2 + 30^2\]Find c and that is your answer :)
OpenStudy (anonymous):
I got 2500 as c^2.
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OpenStudy (anonymous):
Ok. Now find the square root.
OpenStudy (anonymous):
50
OpenStudy (anonymous):
Yup. 50 is your answer.
OpenStudy (anonymous):
See? Math is not eville :)
OpenStudy (anonymous):
You got it?
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OpenStudy (anonymous):
It is awful.
OpenStudy (anonymous):
Not really...once you get the concept, it's easy :)