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    I am trying to locate the centroid of area for a segment of an arch ring. I have calculated the centroid shown by approximately breaking the area of 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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