Bindpoint

Each Circle, or Line of Warding, has bindpoints where Chalklings, Lines of Forbiddance, or smaller Circles may be attached in order to form defensive circles. Different versions of a Line of Warding contain different numbers of bindpoints, based on an understanding of relationships between circles and triangles. The 'type' of Circle made is decided by how the Rithmatist constructing it uses the possible bindpoints for any given defense. Lines of Vigor do not need to be attached to bindpoints in order to work.

Lines of Warding may have 2, 4, 6, or 9 bindpoints. For the first three variations, all bindpoints are placed equidistance. For nine-point circles, bindpoints are placed at points corresponding to an imaginary non-obtuse triangle. More information on how to calculate the points can be found here on Desmos (a free graphing calculator).