Ruler and Compass Construction
Dividing a Segment into Three Equal Parts

Reset
1. Draw arbitrary slanted segment AC
2. Circle centered at A, arbitrary radius
3. Circle centered at D, radius AD
4. Circle centered at E, radius AD
5. Segment FB
6. Circle centered at F, through E
7. Circle centered at D, radius EG
8. Ray EH intersects AB at I
9. Circle centered at A, radius EG
10. Ray DJ intersects AB at K.
11. AK = KI = IB