Place paper so that the long edges shall be parallel with the front edge of desk; bisect the back edge of paper; four inches directly in front place a point; with this point as a center draw a three inch circle.

Place the ruler in position to draw the horizontal diameter - where the ruler crosses the circumference place points ; using these points, divide the circumference into six equal parts; connect all these points with the center.

Draw chords of all arcs except the greater. On the left side of upper triangle construct a circular margin, on the base of lower triangle construct an equilateral triangle by means of arcs; with the intersection of arcs as a center construct a three inch circle and within the circle, triangles as above with circular margin on upper triangle.

In the first circle the upper triangle is No. 1; the upper right, No. 2; lower right, No. 3; and lower triangle No. 4. In the second circle, the upper triangle is No. 5; the upper right, No. 6; lower right, No. 7; and lower, No. 8.

Transfer to a scale of one to two; cut, crease, fold and glue.