User talk:Fourtoke

Circle and cylinder to find to the area of circle, we use the following the equation; AREA= 3.143/4*(diameter of circle)2

to find the area diameter of circle; length of sector = diameter of circle * angle of circle ( radian)/2

for 360 degree;

length of sector = diameter of circle * 3.142 diameter of circle = length of sector / 3.142 Area of cylindrical sector with length L and angle b; Area = sector* L

Area of cylindrical at any angle = diameter of circle * angle * length of cylindrical sector/2

for circle area= 2*3.142* radius of circle * length of cylindrical