math question

[kokopeli]

I need to keep track of fluid in a round tank laying horizontally. I can't figure out how to get the area of a circle under a chord in VB. ______
/ \
/ \
/ \
\__________/
\ XX /
\______/
Imagine this is a circle with a line through it. I need to get the area where the XX is. How can I code this?

[Pentax]

I'm not sure I really understands the figure, but if you paint it a little bit better (for instance in Paint) and mail me, I'll see what I can do.
It shouldn't be that hard, if you got som of the figures (heirght and so)
Pentax

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Wilhelm Tunemyr,
Sweden

[email protected]

"Dort, wo man Bücher verbrennt, verbrennt man am Ende auch Menschen"
Heinrich Heine (1797-1856)

Pravda zvítezi!

You must first find the area of your slice. This is from the middle to the endpoints of the chord. Then you find the area of the triangle that was created by the chord and the two radii. You subtract the latter from the first and that will give you the area. I am working on the equation now.

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Boothman

There is a war out there, and it is about who controls the information, it's all about the information.

[This message has been edited by Boothman_7 (edited 02-21-2000).]

((A/360) * PIr^2) - (((r^2 - (C/2)^2) * (C/2)) * 2)

Where:
A is the angle in degrees
r is the radius
C is the length of the chord

((A/360) * PIr^2) = Area of segment (slice)
(((r^2 - (C/2)^2) * (C/2)) * 2) = Area of the triangle with the chord as the base.

Hope this helps

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Boothman

There is a war out there, and it is about who controls the information, it's all about the information.