Step 3Drawing the base square
iImage Information

Find two touching sides that are perfectly flat. If all of them are flat, then just pick a top and a side and scribble close to the very edge. Only put the flat of the right angle tool on these sides and only measure from these two sides. Now measure and draw a 2 1/2 inch square in the very center of the plate. For example, on my 4 inch plate, I had to measure in 3/4 of an inch in from the edge and drew a line. Then I measured 2 1/2 inches farther and drew a line there. So now I have 2 parallel lines that are 2 1/2 inches apart. Repeat this in the other direction and you will have a perfect square. Now, find the midpoint of each side of the square and mark them. Now draw a straight line between them. You should now have 4 small squares. The picture can better show what I mean.
or draw a template on graph paper like i did.