sq.ft. of a circle and lineal ft. of a circle

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sq.ft. of a circle and lineal ft. of a circle

Postby tommc » Tue Mar 25, 2008 8:45 am

how do you figure the square footage of a circle and lineal footage around the circle?
tommc
 

Re: sq.ft. of a circle and lineal ft. of a circle

Postby Guest » Tue Mar 25, 2008 9:01 pm

tommc wrote:how do you figure the square footage of a circle and lineal footage around the circle?


Measure the radius (half the diameter)
Area = pi*r²
Circumference = 2*pi*r
Pi has infinite digits but 3.14159 is close enough. :)
Guest
 


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