How to make the Great Origami Pyramid

(page 2)

1st picture of Great Origami Pyramid

01.

Let us start with a "balloon base" .

Study the above link to make a balloon base.

2nd picture of Great Origami Pyramid

02.

You need to get a protractor to measure an angle here.

If you don't have a protractor, it is o.k. You could just use a formula given in the step #3.