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into space
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Homework Statement
Problem
Homework Equations
Area of a semi-circle, area of a semi-sector of a circle, centroid of a semi-circle, centroid of a sector, general equation for centroid of a plate:(X-Bar) * [tex]\Sigma[/tex]Area = [tex]\Sigma[/tex](x-bar * Area)
The Attempt at a Solution
Attempt. I tried my best with the handwriting.I forgot to write it down on the link above, but what I tried to do was subtract the area of the smaller semi-circle from the area of the larger-semi-circle and get an Area Q, then subtract Q by the area of the two semi-sectors.
I feel I am leaving something out with the sectors. I think it has to do with the centroids of the semi-sectors because the answer has a cosine in it and the only place where I can find a trig function is the x-coordinate for the centroid of a sector, but since the overall X-coordinate for the figure is 0, I don't know how to approach this.