having trouble defining lines, could anyone take a look and give me some help?

Hi Michael,

Is there a particular reason that you are doing this as a 3D sketch and not a 2D sketch?

Mark

As Mark Biasotti says, it is the 3D-sketch that needs more relations to be fully defined. This image shows the bottom view and you can clearly see that the sketch is in different levels.

Normally a 2D-sketch is better than a 3D-sketch, when only 2D geometry is needed. But if you insist on using a 3D-sketch you can fully define your sketch by constraining some elements "on plane" with Front plane.

You have to add some more relation.

Mainly relation point on Plane.

Just put a construction line at the center and contraints then in x axis