Are of a circle segment

45
Hello!

How do i get the area of this segment on the top of the circle?

w=44.5 mm
h=10.35 mm
r=34.9 mm

I have found some formulas for calculating the area, but it seems like I need some angle.. ? What If i dont know the angle...?

A=0.5*r*(b-w)+w*h

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...

Need help

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2. tiny-tim

26,054

Subtract the area of the triangle from the area of the sector.