Fig. 68
The angle up 45° and down 45° is here repeated seven times.
Fig. 69
In this case we have a great many angles in the line, but they are all right angles, so we have a Harmony of Angles.
Fig. 70
In this case we have Harmony in the repetition of a certain relation of angles, that is to say, in the repetition of a certain form of angularity.
64. Equality of lengths or measures between the angles of a line means a Harmony of Measures.