I'm trying to achieve a perfectly D shape (to use as mountains, teeth and even the body of some cartoon characters) and I'm doing the following process, with the help of the grid to snap into position:
Create a square and in the exactly middle add a node:

Delete the top 2 left and right vertices:

CTRL+DEL the middle added vertice:

But it isn't perfectly shaped. Is is leaned towards the left side (the blue line is the middle in the grid, notice the top of the D is not exactly in the blue line);

So can I get the shape without requiring manual adjustment? (And even if I try manual adjustment it won't be totally balanced).
Thanks!