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Are of a circle segment

by ladil123
Tags: circle, segment
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ladil123
#1
Feb12-09, 09:08 AM
P: 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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tiny-tim
#2
Feb12-09, 11:00 AM
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Hello ladil123!

Subtract the area of the triangle from the area of the sector.
ladil123
#3
Feb12-09, 11:46 AM
P: 45
Sorry, im too slow to get it...

tiny-tim
#4
Feb12-09, 12:05 PM
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Are of a circle segment

Quote Quote by ladil123 View Post
Sorry, im too slow to get it...
Add the segment to the obvious triangle, and you get a "piece of pie".


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