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# Centre of area Watch

1. does anyone know how to find the centre of area of a segment of an arch ring?
2. Sector of circle, radius r, angle at centre 2α : ((2r)sinα)/3α from centre

This is for finding the centre of mass of a segment, so I'm unsure whether it's the same for finding the centre area, I assume so
3. I am trying to locate the centroid of the area (or centre of mass) of a segment of an arch ring. I have calculated the centroid shown by approximately breaking the curve into equivalent triangles and squares and applying the parallel axis theorem, however am sure the results have significant error. I Know the radius and can calculate the formula of the curve if this helps.

Any help would be much appreciated...

p.s. only interested in finding the horizontal distance (i.e. x-axis)

Andrew
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4. Thank you for the reply, I am new to the forum
5. (Original post by andymorl)
Thank you for the reply, I am new to the forum
Sorry, this question is officially out of my depth, but it would be better (and you'd more likely get a suitable reply) if you post a thread in the Maths Forum here
6. Thank you Kayla, posted in a few others too!

Andrew
7. (Original post by andymorl)
Thank you Kayla, posted in a few others too!

Andrew
No problem, happy to help (as much as I can)

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