Draw a circle with half the diagonal of the octagon as the radius.
Draw two vertical diameters and divide the circle into four equal parts.
Divide these four equal parts into eight 45 degrees.
Paired lines connect these eight equal points on the circumference of the garden.
First of all, design pattern, plane, elevation, details, component connection, top layout, etc. A series of questions are thought of in advance. Octagonal tops are large and small, simple and complex.
Method 2:
Draw a rectangle with a ruler, with short side 2 and long side 4.
Mo Dou drew the directions of eight corners with a ruler, as shown in the figure below.
According to the required size, cut from the center of each straight line, point nodes,
The points connected by straight lines are octagonal or octagonal.