Moment of Inertia: Check My Calcs for Iy

[aaronfue]

Homework Statement

I was wanting to see if someone could check my calculations. I've checked out the Iy and Ix in Autodesk Inventor and what I got is wrong.

Here are the links to my images. I apologize, the uploading option is not allowing me to upload the pictures.

http://postimage.org/image/re825r20b/
http://postimage.org/image/vomq1c73f/
http://postimage.org/image/lkdgw1dyv/

Homework Equations

I believe the only one that is wrong is the triangle?

My centroids were all correct, including my areas. So I'm sure my calculations for MOI's are wrong somewhere.

 

[SteamKing]

The MOI of the triangle is wrong.
Are you supposed to calculate Iy about the tip of the triangle or about the centroid of the entire figure?

 

[aaronfue]

The MOI of the triangle is wrong.
Are you supposed to calculate Iy about the tip of the triangle or about the centroid of the entire figure?

I was supposed to calculate Iy of the entire figure, but still wanted to calculate each shape. I was able to get the MOI of the triangle: \frac{1}{36}