math

Let's start with my favorite geometry and trigonometry formulae...
pi=C/d
pi=the circumference of a circle divided by it's diameter...I think a lot of people forget this fundamental principal of circles and forget what pi really is
Just remember that the volume of any prism (or cylinder) is the area of the base times the height
The volume of a cone is 1/3 of the area of a cylinder with the same height and base
Also, the volume of a sphere is...ready for this...I can feel the excitement...just can't take it can you...the tension is building...um...what was I building up to?...oh yeah, the volume of a sphere is (4/3)*pi*r^3
a^2+b^2=c^2 Pythagoras, what a fun guy
c^2=a^2+b^2-2abCosC A little twist on the pythagorean theorum that we like to call "the law of Cosine"

Now, on to the physics...
hmm...I don't remember any of the fun physics formulae we learned last year...none of the time dilation and reference frames...nothing, well, as I said, fun...but I do remember a few of the basics
M=mv
...this one's just fun to say...Mmv
Ok, I feel it necessary to add this fundamental physics formula to the list F=m*a An obvious must

And who can forget our favorite chemistry formulae...
density=mass/volume
...that's just so drab...I prefer the molar mass conversions:
Number of moles=Mass/Molar mass
Let's move on to the really fun stuff...Boyle's Law...or not, but only because I don't remember which law is Boyle's and which is Charle's and such...so we'll just do this:
pV=nrT
where p=pressure, V=volume, n=the number of moles, r=a constant and T=temperature (in kelvin, of course)

Ok, I know everybody loves these, but I'm gonna move on to calculus
Um...Calculus is hard and I don't really like any of the formulae in it, but I suppose the half-life formula is pretty handy:
f(t)=f(0)*(1/2)^(t/h) where f(0) is your initial amount, t is the amount of time that has passed, f(t) is the amount after t time and h is the half-life of the given substance
I also like the rule of 72, but I'm having trouble thinking clearly and can't remember what it does exactly...something about the doubling time of an investment (or whatever) times the percent of increase will always equal approximately 72...actually, it's closer to 70, but 72 is handy for anything divisible by 3 or 4...

Okay, by now, you're thinking what a loser I am...which is true...but, hey, YOU'RE actually still reading this crap...man, you might be as much of a dork as me...ok, probably not...but anyway...

On to the miscellaneous formulae that I can't put in a category:

I know everybody loves this one...
e^(i*pi)=-1 or e^(i*pi)+1=0 ...this is just so fun...

Well, I just realized that while I should be savoring my winter break, I've been trying to remember everything I've learned in all my years of high school...pathetic, isn't it...well, I'm out for now, although if I come upon any great formulae, you can be sure it'll be on here within a few days

One last thing...did ya notice that I didn't use Einstein's theory of Relativity on here anywhere? ya know...E=mC^2...that's because I think it's one of the most overused and under-understood formulae I've ever seen...Yes, I'm out now...back to my normal pathetic life

And just so you know pie=8.1 that's pi*e...3.14*2.71...help me, i need a life