How To - page 4

Make a tetrahedron
Fold 3 diameters into the circle. Fold 3 alternate points on circumference (one end of each diameter) to the center point. (Be accurate in putting the points together otherwise the folds will not be accurate.) Crease well. This forms a 2-frequency equilateral triangle.

Fold each end point of the triangle to the mid point on the opposite side. Do all 3 points separately. Do not overlap these folds. Crease well each fold using a hard straight edge. Bring end point together forming a tetrahedron. Tape full length along edges to hold together.