The sixth grade mathematics quality test Chapter 7 Comprehensive test of drawing line segments and angles (1)
F is the midpoint of bc bf=fc bf=ac/5=fc, then ab is the remaining 3\5 and ae=eb\2, so obviously the length of the line segment from left to right is 1 \ 5, 2 \ 5, 1 \ 5, 1 \ 5.