Erm , from your diagram , i guess W is the length of the chord . If so , we can apply this formula :
, We know the r and thus we can find
So now you have the angle .
Area of a segment =
How do i get the area of this segment on the top of the circle?
I have found some formulas for calculating the area, but it seems like I need some angle.. ? What If i dont know the angle...?
b is the arc length, b = r*angle*pi/180
How do I use this angle?
I know that the answer should be approx 696 mm2 from a computer program, but I cant do it analytically...