25 Ways To Construct An Octagon With A Compass

A mechanical compass with pencil A pencil eraser A ruler A spare pencil (recommended)

The upper right most intersection should be called point K. The lower left most intersection should be called point L.

Points I and M, creating line segment IM Points M and K, creating line segment MK Points K and C, creating line segment KC Points C and J, creating line segment CJ Points J and N, creating line segment JN Points N and L, creating line segment NL Finally points L and B, creating line segment LB

As you can see, this is why its better to use light marks. Otherwise, your drawing may have this hard-to-erase marks left over.