Posted by Crystal on Friday, March 30, 2012 at 11:51pm.
C = Circumference
A = Area
r = Radius
C = 2 r pi Divide both sides with 2 pi
C / 2 pi = r
r = C / 2 pi
A = r ^ 2 pi
A = ( C / 2 pi ) ^ 2 * pi
A = ( C ^ 2 / 4 pi ^ 2 ) * pi
A = C ^ 2 / 4 pi
A = 25 ^ 2 / 4 pi
A = 625 / ( 4 * 3. 14 )
A = 625 / 12.56
A = 49.761 m ^ 2
A = approx. 50 m ^ 2
Thnx!!
Related Questions
math - the radius of a circle when the numeric values of the circumference and ...
7th grade algebra - Find the area of the circle with the given circumference C ...
Algebra - The Circumference and area of a circle of radius r are givin by 2 [pie...
Algebra - The area of a circle is given by the formula A = pi*r^2 and the ...
math - the radius of a circle when the numeric values of the circumference and ...
college algebra - The diameter of the Earth is approximately 7,920 miles. Given ...
math - how do you find the diameter of a circle if you don't have the radius...
geometry - Which is the area of a circle with a circumference of 37.68 units? (...
Math - Two perpendicular diamters(cutting each other at right angles) of a ...
Math - The area of a circle is given by the expression pi(16x^2 - 40x + 25) . a...
For Further Reading
