Similar to drawing of a circle (to look) at a drawing method, only we instead of a square will draw a rectangle. Let's halve it.
I will inflate a half we will halve the vertical line still.
Now we need to plan a dotted line an oval form. About the main crossings an oval form convex, therefore hyphens under very small knot. Further we should plan hyphens on straight lines which divided two half of a rectangle for in half. The distance from the parties has to be identical from below and from above. Distance it has to be not really big, the oval becomes wider, the this distance becomes even less.
We connect dotted lines. Remember that on median crossings the oval form almost completely adjoins.
Here so, you can see it if to draw without ruler, very equal oval too turns out.