Figure 3
Morphologies of variant pairs: (a) acute type I with \({\mathbf{m}}_{{{I}}}^{{\text{S}}}\), (b) obtuse type I with \({\mathbf{m}}_{{{I}}}^{{\text{S}}}\), (c) type I with \({\mathbf{m}}_{{{I}}}^{{\text{L}}}\), (d) acute type II with \({\mathbf{m}}_{{{{II}}}}^{{\text{S}}}\), and (e) obtuse type III with \({\mathbf{m}}_{{{{III}}}}^{{\text{L}}}\). Black arrows indicate the directions of the intersection lines of two HPs.
