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rock.freak667

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## Homework Statement

I have to find the area moment of inertia about an axis 33 to the x-axis

http://img227.imageshack.us/img227/2392/shape.jpg [Broken]

## Homework Equations

[tex]I_\phi=\frac{1}{2}(I_{xx}+I_{yy})+\frac{1}{2}(I{xx}-I_{yy})cos2\phi - I_{xy}sin2\phi[/tex]

## The Attempt at a Solution

I found I

_{xx}, but since it is symmetrical, I

_{xx}=I

_{yy}, and since it is symmetrical about the x and y axes, I

_{xy}=0

So the I about any axis is just the 1/2(I

_{xx}+I

_{yy}) = I

_{xx}.

Is my thinking correct, or am I mistaking it?

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