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#1 2013-03-07 08:03:42
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Geometry Formulas
I was just curious, what is the formula for the surface area and volume,
and respectively, for a pyramidal frustum and a conical frustum? I would prefer you to put it in LaTeX so I can easily understand it. Thanks!Note: later I may ask for other formulas, so don't put away your brain when you're done!
#2 2013-03-07 08:21:06
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Re: Geometry Formulas
Oops, I almost forgot; I would also like a picture showing where the demensions are. Thanks...again!
#3 2013-03-07 20:10:12
- bobbym
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Re: Geometry Formulas
Hi;
For a right pyramidal frustum:
Look here for more:
http://mathworld.wolfram.com/PyramidalFrustum.html
Last edited by bobbym (2013-03-07 20:11:26)
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#4 2013-03-08 03:08:47
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Re: Geometry Formulas
Thanks!
I do want to ask though, is a right frustum just a straight, generic one? Or is it one that is tilted?
Also, I checked out the link, and it seems that the full surface area (as in, the whole surface of it including bases) is:
Am I right? I am kind of confused. The volume formula though, is easy for me to understand.
#5 2013-03-08 08:08:02
- bobbym
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Re: Geometry Formulas
Hi;
It is much better to write it like this:
check out this url:
http://www.ditutor.com/solid_gometry/fr … ramid.html
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#6 2013-03-08 09:48:43
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- Guest
Re: Geometry Formulas
Sorry I wrote that wrong.
Thanks, again; I think I now understand it. (:
#7 2013-03-08 10:48:08
- bobbym
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Re: Geometry Formulas
Hi;
Okay, you are welcome.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#8 2013-03-09 12:30:13
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- Guest
Re: Geometry Formulas
Next geometry question I've been wondering:
What is the perimeter
I was thinking it was where is the larger radius, but what about the inner part?
Is that included in the formla, or is it just the 'strict' outside?
#9 2013-03-09 12:37:08
- bobbym
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Re: Geometry Formulas
Hi;
The perimeter of an annulus is the sum of the perimeter of the two circles, interior and exterior.
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.
#10 2013-03-09 13:37:14
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- Guest
Re: Geometry Formulas
6 more (these might be tougher than before):
1. A & P of a Lune of Hippocrates.
2. V & S of spherical cap.
3. V & S of a spherical sector.
4. V & S of a spherical segment.
5. V & S of a spherical shell.
6. V & S of a spherical wedge.
Where V = volume, S = surface area, A = area, P = perimeter.
#11 2013-03-09 14:10:53
- bobbym
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Re: Geometry Formulas
Hi;
The area of a lune can be found right here:
http://mathworld.wolfram.com/Lune.html
In mathematics, you don't understand things. You just get used to them.
90% of mathematicians do not understand 90% of currently published mathematics.
I am willing to wager that over 75% of the new words that appeared were nothing more than spelling errors that caught on.