2006-12-10 19:04:59 · 7 answers · asked by *Where the stars are* 1 in Science & Mathematics ➔ Mathematics
pi is nothing but the ratio of the circumference of a circle to its diameter
radius=1/2 the diameter
2006-12-10 19:14:39 · answer #1 · answered by raj 7 · 1⤊ 0⤋
I am assuming you are trying to rate (pi) with radius of a circle. There is an advanced answer to this which I will not discuss unless it is what you what.
You would to realize that the Area of a circle is given by:
Area = (pi) x (r) x (r)
which means: pi times radius of circle times radius of circle again
this means: pi times radius squared.
area = pi x (r)^2
Also, the circumference (the length of the circle ) is given by:
Circumference = 2 x pi x r
or
Circumference = pi x diameter
The radius is always half the diameter. The radius is from exactly the center of the circle to any point ON the circle. The diameter is a straight line any point On the circle, through the center, and to a point directly to the other side.
What you want to know is when the diameter of the circle is exactly 1, than Pi must be 3.14 (rounded off).
Area = pi x (0.5)^2 Here i used 0.5 of half the diameter which is r.
When the diameter is one, the circumference (the length of the circle will be the value of Pi.
C = pi x diameter
C = pi x 1
then C must be pi.
2006-12-11 03:27:11 · answer #2 · answered by Jonathan Paek 1 · 0⤊ 1⤋
they all have to do with a circle. pi x radius squared=the area of a circle(the radius is half the the diameter of a circle btw)
2006-12-11 03:10:19 · answer #3 · answered by llloki00001 5 · 0⤊ 1⤋
the ratio of the circumference of a circle to its diameter is pi.
whenever u consider a circle..let it be any circle..if u take the ratio of circumference and diameter,u will always get 22/7 or pi..
2006-12-11 05:51:06 · answer #4 · answered by For peace 3 · 0⤊ 2⤋
i think it has something to do with Pi referring to a circle, or something and radius and diameter are the width of a circle...i think. sorry, i am only in general maths. lol
2006-12-11 03:11:05 · answer #5 · answered by panicatthediscoobsessed 2 · 0⤊ 1⤋
The circumference of a circle is always 3.1416 times its diameter. If you are going to use a string to measure the diameter of a certain circle, you need 3.14 times of that string to measure its circumference.
2006-12-11 03:38:04 · answer #6 · answered by jayem 1 · 0⤊ 2⤋
It's quite basic, maybe you should have attended that class!
2006-12-11 03:13:58 · answer #7 · answered by adr41n 3 · 0⤊ 1⤋