Is it pie times the radius squared, or pie times the square of the
radius?
2006-07-02 19:59:17 · 12 answers · asked by rusty math 5 in Science & Mathematics ➔ Mathematics
First thing first.. Correction.. It's spelled pi not pie.. But pronounced the same as pie..
Next...
Both sentences are actually the same...
It starts with pi times something... And the something is radius squared or the square of the radius.. Which when written is r^2...
So technically, you are right... But anyway...
Pi times the radius squared will give you the area of a circle..
πr^2...
If you wish to apply pi with other formulas...
Following are some examples..
To calculate circumference of a circle...
πd OR 2πr...
To calculate volume of a sphere...
4/3(πr^3)...
Hope you are clearer now...
Cheers... (",)
2006-07-02 20:26:53 · answer #1 · answered by Ellusive Lady 3 · 2⤊ 1⤋
There are several: C = pi*D, A = pi*r^2, V = 2/3*pi*r^3, are common ones.
Wikipedia is always a good source for this kind of question:
The mathematical constant Ï is an irrational number, approximately equal to 3.14159, which is the ratio of a circle's circumference to its diameter in Euclidean geometry, and has many uses in mathematics, physics, and engineering. It is also known as Archimedes' constant (not to be confused with Archimedes number) and Ludolph's number.
There is much more at the link below.
2006-07-03 03:08:09 · answer #2 · answered by Engineer 6 · 0⤊ 0⤋
pie times the radius squared
2006-07-03 03:39:11 · answer #3 · answered by Crazy Dude 1 · 0⤊ 0⤋
pie x radius-squared=circumfrence
1/2 pie radius=area sumthing like that
2006-07-03 03:05:00 · answer #4 · answered by L to the R to the V 1 · 0⤊ 0⤋
"Circumference of a circle to the radius of the circle ratio" is called as Pi. We cannot have a 100% accuracy pi value, but it is marginally equals to
3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480
I don't know exactly what you are asking, but I guess you asking the equation of how to find the area of a circle. It is pi.r^2.
2006-07-03 05:48:18 · answer #5 · answered by Azmil M. 2 · 0⤊ 0⤋
it's pi times radius squared, and you spelled 'pie' wrong. it's pi. you've got pie, as in apple pie. and there's more than one formula that applies. such as pi times 2 times the diameter, etc.
2006-07-03 03:04:22 · answer #6 · answered by DBSG/SS501_fan 2 · 0⤊ 0⤋
radius squared and square of the radius is the same thing...
area circle = pi r^2
2006-07-03 12:49:16 · answer #7 · answered by Anonymous · 0⤊ 0⤋
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2006-07-03 03:06:26 · answer #8 · answered by Pascal 7 · 0⤊ 0⤋
C=2*pi*r
A=pi*r^2
S=4*pi*r^2
V=4/3pi*r^3.
An exact formula for pi in terms of the inverse tangents of unit fractions is Machin's formula
1/4pi==4tan^(-1)(1/5)-tan^(-1)(1/(239)).
2006-07-03 05:03:57 · answer #9 · answered by NastyBoi 1 · 0⤊ 0⤋
pi= circumference/diameter. pi x r sqrd = area. pi x r cubd = vol.
2006-07-03 03:41:33 · answer #10 · answered by mr.phattphatt 5 · 0⤊ 0⤋