How to use ruler and compass to divide a straight line into 12 equal parts

First divide into 2 equal parts, then into 2 equal parts, then into 3 equal parts.

Needless to say 2 equal parts, let’s talk about dividing the line segment AB into 3 equal parts:

Draw a ray from point A in any direction, and use a compass to draw 3 on the ray. The equal line segments AE, EF, and FG connect the outermost point G and the other end point B of the known line segment, and then draw a parallel line GB through F, intersect AB at D, and draw a parallel line GB through E, and intersect AB to C. Point C and D to divide AB into three equal parts