You need compasses, or you can use a graduated ruler. Isn't it meaningless to divide a line segment into five equal parts? Isn't your straight line longer than before? Generally, the method of bisecting a line segment is as follows: draw a line segment AB (with any length) on white paper, then (a) draw a ray diagonally above it, then cut five line segments with the same length from the end of the line segment with compasses or scales, and the corresponding points are 1 2 3 4 5 respectively, and then connect the point 5 with the endpoint (b) of the line segment to get the line segment 5B. Then the intersection point is 4 3 2 1, and the parallel lines of line segment 5B and line segment AB each have an intersection point, that is, line segment AB is divided into five equal parts. In fact, you need to divide the line segment into several equal-length line segments on the ray, and then the last point is connected with the endpoint of the line segment to get a line segment, and then the intersection points of other points and line segments parallel to the line segment are made in turn.