After drawing the symmetry line between squares, draw a circle in the square with compasses, then connect all eight points of the symmetry line, and finally erase the square, circle and redundant lines.

First, draw a square on the paper with a compass and its four symmetrical lines. Draw a circle with a compass in the square, as shown in the figure. Connect all eight points of the symmetry line, and finally erase the square and circle, as well as the extra lines, and you can get an octagon.

Precautions;

When drawing a square, try to make it bigger, otherwise it won't be easy to wipe. When drawing lines, you must use a ruler, not just hand drawing. Finally, when wiping lines, don't erase the connected symmetrical lines.

Draw a square and four symmetrical lines on the paper with a compass. Draw a circle in the square and connect the eight endpoints of the symmetry line. Just erase the remaining lines.

Draw a square on the plane first. Draw it step by step. Draw a straight line based on two diagonal points of a square. Draw another square outside the small square so that the four corners are on the diagonal extension of the small square.

Draw four vertical diagonal lines based on the four corners of a small square. Lines needed to connect regular octagons. The moral of octagonal furniture represents five lines of gossip. The five elements give birth to yin and yang, and two opposing qi are the source of everything in the world.

The combination of yin and yang, the growth of everything, means a family, such as alternating yin and yang, but long. Although it is turned upside down, everything is the same. The meaning of all family harmony.

For this question:

I think first draw a circle with a compass, then divide the circle into eight parts evenly with a compass, and finally connect the points in turn, thus drawing an octagon.

How to draw an octagon

Draw a square on the paper with a compass, draw four symmetrical lines, and draw a circle on the square with a compass. Connect the eight endpoints of the symmetry line (the point where Fiona Fang intersects and the point where a circle intersects the symmetry line), and erase the remaining square lines, circles, etc. With an eraser, the octagon is finished.