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## Homework Statement

Determine the polar moment of inertia and the polar radius of gyration of the shaded area shown with respect to point P.

http://imgur.com/8Kc1S

## Homework Equations

Jp = Ix + Iy

Ix = &int y^2dA

Iy = &int X^2dA

## The Attempt at a Solution

A = 2(a/2)(a) + (2)(1/2)(a/2)(a) = 3a^2/2

Jp = Ix + Iy

Ix = &int y^2dA = ??? Im having trouble with this next step. If someone could please help me with it and explain to me whats suppose to integrated I would be eternally grateful

I have 2 &int a-0