Also, here are some basic formulas that PI is typically used for:
AREA OF CIRCLE: PI (3.14) times the circle's radius squared.
CIRCUMFERENCE: 2 times the circle's radius (which may be substituted for the circle's diameter btw) times PI (3.14).
PI's mathematical significance is that it's the factor by which the area or circumfrence of a circle are related to it's radius. PI is also the factor by which the volume of a sphere is related to its radius.
Because of this relationship, a complete circle (or 360 degrees) is equal to PI radians.
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It's just number 3.14 with unlimited decimals, and what's SATs?
EDIT: It would be better if you could specifiy what exactly you want to know.
SAT's are the Massachusetts (Idk about other places) test in junior year of HS to get into college. Colleges compare these scores as one way of seeing what you know.
Can someone help me learn Pi? I don't know it and I need to know it for my SAT's. :(
It's just number 3.14 with unlimited decimals, and what's SATs?
EDIT: It would be better if you could specifiy what exactly you want to know.
@StatusQ3: Go
Hi StatusQ3, It is probably best for you to browse the web for resources, or else see if you can find anything at a library.
Here are a couple of websites you might try:
http://www.math.com/tables/constants/pi.htm http://www.mathgoodies.com/lessons/vol2/circle_area.html
Also, here are some basic formulas that PI is typically used for:
AREA OF CIRCLE: PI (3.14) times the circle's radius squared. CIRCUMFERENCE: 2 times the circle's radius (which may be substituted for the circle's diameter btw) times PI (3.14).
Edit:
This is a great website for learning mathematics:
http://www.khanacademy.org/
@StatusQ3: Go
PI's mathematical significance is that it's the factor by which the area or circumfrence of a circle are related to it's radius. PI is also the factor by which the volume of a sphere is related to its radius.
Because of this relationship, a complete circle (or 360 degrees) is equal to PI radians.
Divide the circumference of any circle by it's diameter and you will always get Pi :).
Half-circle (180°). Full circles are 2pi radians.
@redmarine: Go
Wikipedia says: standardized test for college approval
(you only really require the first half of it ... if you ever)
Also a side note: A pizza with the radius z and height a has the volume: Pi*z*z*a
Conversation from deg to rad
1° = pi/180
rad(x°) = x*( pi/(180) )
Pi is also used for rotation of vectors, matrices, etc. all that stuff
to get a point on a circle line with radius r (in 2D) i don't think 3D would be required for college approval :o
(notation hint:
defines:
R² -> R²
degrees <e R²
rad = rad(degrees%360)
^p <e R² (2d vector)
^p.x = cos(rad)*r
^p.y = sin(rad)*r
also a good site:
http://www.wolframalpha.com/input/?i=Pi
I cannot recall a time when I ever needed to know pi to more than 2 decimal places to be honest, standardized tests or college.
SAT's are the Massachusetts (Idk about other places) test in junior year of HS to get into college. Colleges compare these scores as one way of seeing what you know.
Thanks for all the help guys. I have some studying to do now. :)
@Reaper872: Go
Wait, you have SATS in the US? O_o Next you'll be telling me you do GCSEs and A-Levels!
@wOlfLisK: Go
Idk about that but we do have ACTs :p
@Xhahix: hilarious pizza bid, and great help for anyone unto pi...