我们在工作中会遇到把圆周分成任意等份的问题,例如画五角星等。现在就介绍一下多角星的画法。四角星很好画。但是为了说明方法,还是讲一讲。第一步,先用直尺划一个直径,长度等于4厘米,每厘米点一个点。第二步,以2厘米为半径,以中点为圆心画一个圆。再以4厘米为半径,分别以直径的起点和终点为圆心,画出上下交叉点。通 In our work we will encounter the problem of dividing the circle into arbitrary equal parts, such as the drawing of a five-pointed star. Now let’s introduce how to draw a star. The four-pointed star is well painted. However, to explain the method, let’s talk about it. In the first step, first draw a diameter with a straight ruler, and the length is equal to 4 cm, one point per centimeter. In the second step, draw a circle with a radius of 2 cm and a center point. Then, with a radius of 4 cm, the starting point and the ending point of the diameter are centered, and the upper and lower intersections are drawn. through