Determine the polar moment of inertia of the area shown with respect to point O. Hint: your calculationsshould show J (semi-circle) – J (rectangle).For extra credit: Find the polar moment of inertia about the centroid of the area. Extra credit hint: Applythe PAT one time for the whole shape. Once you know "a" moment of inertia for a shape, you can applythe PAT to that shape. This is a "sneaky" way to find the moment of inertia about a centroid location.We can apply PAT to any shape – it does not have to be one of the standard shapes we find in a publishedtable.)(Answer to check your work: Jo = 13.09(103) in4)12 in.8 in.6 in.6 in.

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