CONSTRUCTING THE
N O N A G O N
Given a circle, inscribe a regular nonagon in the circle.
Step 1. Draw a diameter AB across the given circle.TrisectAB. Call the trisector P1.
Step 2. Trisect segment AP1. Call the second point P2.
Step 3. At point A, construct a circle with radius AB. At point B, construct a circle with radius BA. Call the intersection of circle A and B, C.
Step 4. Connect C and P2 with an extended line. Line CP2 intersects the original circle at P3.
Step 5. Point A, and P3 are 2 points on the nonagon. Use it to find the other 7 points.
| Square | Triangle and Hexagon | Pentagon | Golden Ratio | Heptagon |
| Pentadecagon | Heptadecagon | N-Gon | Squaring a Circle | Basic Constructions |
