We locate the center.

and draw the largest circumference of radius 7 centimeters.

By this center we draw a vertical and a horizontal.

by the procedure of the Pentagon enrolled in a circumference, we divide it into five equal parts.

These parts unite with the center.

We draw the other two concentric circumferences, radius 6 and 2 centimeters.

The Pentagon generates 5 axes of symmetry.

Now, draw parallel lines, on both sides of these axes, with a separation of one centimeter.

is measured half a centimeter on each side of these axes and are plotted parallel to them.

We draw a line from or one, with any direction.

How the link we will have to make, is inside the circumference of radius 6, we will have to measure 1.5 centimeters towards the center.

With this measure we draw another concentric circumference, which will have all the centers of the links.

We draw a parallel to one of the lines of the links, with a separation also of 1.5.

at the intersection with the previous circumference you will find the center of the searched link.

by axial symmetry, with respect to the five axes of symmetry of the Pentagon, are found the other centers of the links.

Always use the same opening radius of the compass.

To locate the tangency points, we will have to join the center or one, with all the centers of the links, with straights that will cut in the circumference of 6 centimeters.

Now, we combine the symmetrical centers with each other, to find the points of tangency with the lines.

We trace the arcs of the links, with radius to these localized tangency points.