Q:

Illustrator: How to accurately align shapes

i didn't really use Illustrator before, but i'm having troubles with some basic things such as aligning shapes together accurately. I'm using this auto-snap feature to align things but it's never really pixel-accurate as shown in the screenshots:

Whenever i try to resize the shape so that it fits the edges of the circle it snaps back as shown in the screenshot. Don't get me wrong, i just want to have the shape the same size as the outter circle.

A:

If you cut out the central circle from the larger circle the object path will run around the remaining "O" shape. The auto align features will then snap to this path easily.

