2007-02-21 08:54:43 · 6 answers · asked by colour_my_world<3 2 in Education & Reference ➔ Homework Help
circumference-diameter x pi
area- pi x radius squared
2007-02-21 08:59:41 · answer #1 · answered by coolio 2 · 0⤊ 0⤋
http://www.mathgoodies.com/lessons/vol2/circumference.html
The circumference of a circle is the distance around the circle.
The formula: Circumference / diameter = Pi. If you know the diameter, you can find the circumference because you have the value for the diameter and Pi.
http://www.mathsisfun.com/area.html
Area is Pi x (radius x radius). Radius is half of the diameter.
I hope this helps!
2007-02-21 17:09:33 · answer #2 · answered by mandirae23 2 · 0⤊ 0⤋
Circumference = diameter*pi
Area= pi*radius^2
2007-02-21 17:00:23 · answer #3 · answered by hannahloulou 2 · 0⤊ 0⤋
use the formula C=pi x D
meaning circumference equals 3.14 multiplied by the diameter. OR if you have a radius use C=pi x r2
meanig circumference equals 3.14 multiplied by the radius squared (multiply the radius by itself)
2007-02-21 17:05:26 · answer #4 · answered by KiraMitzuki 2 · 0⤊ 0⤋
you find the circumference by multiplying the diamater and pi.
C = d x pi
you find area by mutiplying pi and the radius to the second power.
A = pi x r^2
you find diamater by multiplying the radius by 2.
2007-02-21 17:01:43 · answer #5 · answered by Erica Marie 1 · 0⤊ 0⤋
the area of a circle is 2*pi *radius, the circumfrence is pi* radius squared. Pi is a constant value that equals 3.141592654.
2007-02-21 17:01:05 · answer #6 · answered by Anonymous · 0⤊ 0⤋