Angled Sketch Plane Dimensions Wrong. Why?

[glencandle]

I've searched this problem first but I can't find a solution.  Basically when I create a sketch plane with an offset angle of 10-degrees, then draw a sketch on it, the math for the drawing doesn't work out.  

When I'm drawing my sketch I'm making a rectangle that is exactly 33" x 45" along X,Y.  Yet when I use the Dimension tool and measure the drawing I get 33.104" x 44.923".

I'm sure this is because of the angle of the sketch plane (10-degrees), but I have no idea how to get around this.  I need this part, despite the angle, to exactly 33x45.  What do I do?

[glencandle]

Yes that is logical. Also irrelevant in my case as I only used the plane
below as a reference for the sketch above (I basically projected it,
criss-crossed it to grab a center point, and then used that point as a
start point for the new sketch).

Still no clue what happened, everything in the project (which has many
components) was fine until the very end when I started working on that
angled sketch plane.

Anyway, no bother, I found a workaround and if the problem ever happens
again I have some good information here to troubleshoot. Cheers.