2. Fix a point, that is, the center of the circle, and then draw two lines of equal length in the horizontal and vertical directions with a ruler, which is equivalent to a standard cross. This is the main skeleton.
Next, draw as many lines of the same length as possible at a small angle with this point as the center in the same way, and then connect them to form a garden.
A ruler, also called a middle ruler, has a precise straight edge and is used for measuring length and drawing. Rulers are widely used in mathematics, measurement, engineering and other disciplines. A ruler with a precise ruler. Rulers are used to measure straightness and flatness by light gap method, and can also be used.