I need it with DIAMETERS, not
RADIUS. Please...
2006-09-12 11:37:22 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
take half the diameter - and square it - multiply it by itself (but you probably knew that). for example if the diameter is 6 inches, take 3 inches and multiply it by 3 3x3=9 and then multiply it by 3.14
2006-09-12 11:42:34 · answer #1 · answered by zaeli22 3 · 1⤊ 0⤋
take the given diameter and divide it by 2, that gives you the radius... once you have the radius finish the problem. I assume you already have the formula for the area of a circle using the radius.
2006-09-12 18:48:24 · answer #2 · answered by Justaguyinaplace 4 · 0⤊ 0⤋
First the radius of a circle is equal to 1/2 the diameter
r = d/2
formula for an area of a circle is
a = pi(r)^2
a = pi(d/2)^2
a= pi(d^2/4)
2006-09-12 18:48:47 · answer #3 · answered by Anonymous · 0⤊ 0⤋
You can't do it with the diameter. The formula is radius squared times pi, divided by 2
2006-09-12 18:43:34 · answer #4 · answered by McKenzie C 1 · 0⤊ 0⤋
The most frequently encountered formula is A = pi*r^2. But since r = d/2, A = (pi/4)*d^2.
2006-09-12 18:39:34 · answer #5 · answered by DavidK93 7 · 0⤊ 0⤋
radius is half the diameter
area is pi x radius squared
so area is pi x d/2 squared or pi x d sq/ 4
2006-09-12 18:41:30 · answer #6 · answered by mrmoo 3 · 0⤊ 0⤋
pi*diameters^2/4
2006-09-12 18:39:45 · answer #7 · answered by Hex 2 · 1⤊ 0⤋
Divide the diameter by TWO then use the one for radius!!!!!!!!
2006-09-12 18:50:10 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Area = pi(d/2)2<(the last 2 is squaring the (d/2))
2006-09-12 18:43:03 · answer #9 · answered by SimplyMe 2 · 0⤊ 0⤋
one half the diameter times 2 times pie i think
2006-09-12 18:42:23 · answer #10 · answered by big bear 1 · 0⤊ 0⤋