sketch

Is there a way to create a bridge from a face of a solid to another face? I need to join/connect a circle with an oval...

I want to use a plane that no plane or surface exist yet. Is it possible to move a surface downward or upward direction (ie paralel to its normal vectors) ? I think this would suffice 

So when I try to make a sketch and use a cylindrical face's top or bottom relative to sketch plane to dimension off of I cant awaken it as a line nor can I use convert entities to make it into a line. This is killing my design intent as I have to dimension off of weird points I put on a while back into my design. Am I…

I draw a star by crossing lines. Now I like to join those lines to create the start shape I am after. How can I combine all the lines so that the small segment inside either get removes or become a separate line segment that I could remove manually? I want to only have the outer lines left.