Equilateral triangle from an A4 sheet (solution)

If you don't know what the problem was, go here.

So, here's the solution. All we needed to do was find the point on the dashed line (left fig.) which would give us our equilateral triangle. Which can be done by folding the paper as shown in the figure in the right. Simple, eh?

Click here to see the figure.

I'll post pictures of the origami too, soon :)

Update:
Someone asked for a clarification, so here it is (image).

Once you get the point, fold along that point and one of the bottom corners. Tear. Repeat with the other corner. Done.