2007-12-20 17:45:43 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Area = PI x Radius^2
Radius = sqrt (Area / PI)
Diameter = 2 sqrt (Area/PI)
2007-12-20 18:05:20 · answer #1 · answered by ideaquest 7 · 0⤊ 0⤋
The formula for the area of a circle:
A = Ï r²
where A = area, r = radius, Ï ('Pi') = 3.14
since diameter (d) = 2 times the radius, so the formula will be:
A = Ï (½d)² = ¼ Ï d²
to get the diameter:
d² = 4A / Ï
d = 2 â(A/Ï)
2007-12-21 02:04:44 · answer #2 · answered by rustabout 4 · 0⤊ 0⤋
area of a circle= pi*(radius)^2;
putting the values above u will get radius of the circle.
now diameter of the circle=2*radius of the circle.
2007-12-21 01:51:34 · answer #3 · answered by anuj k 1 · 0⤊ 0⤋
area = pi r^2
if you have the area you can find the diameter, just put it into that formula and find r, once u have r then multiply it by 2. diameter = radius x2
2007-12-21 01:51:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋
area= pi R2
solve for R
R is the radius of the circle
diameter = 2 x radius
2007-12-21 01:48:36 · answer #5 · answered by Stephen Y 6 · 0⤊ 0⤋
FORMULA FOR FINDING AREA OF A CIRCLE IS (22/7)r*r
substituting ,you can find radius. double it .you get diameter
2007-12-21 05:04:33 · answer #6 · answered by chaitanya 1 · 0⤊ 1⤋
d= â (area of circle x 4 / ¶ )
where:
d diameter
¶ phi
i hope this will help ur studies
2007-12-21 01:55:21 · answer #7 · answered by aries 1 · 0⤊ 1⤋
pi R^2 =area..so find R...2R=diameter
2007-12-21 01:49:29 · answer #8 · answered by Anonymous · 0⤊ 0⤋
from area , get radious
diam = 2pi*radious
2007-12-21 02:08:23 · answer #9 · answered by Nur S 4 · 0⤊ 0⤋
A = Ï r ²
r ² = A / Ï
r = â ( A / Ï )
d = (2) â ( A / Ï )
2007-12-21 03:07:08 · answer #10 · answered by Como 7 · 1⤊ 0⤋