solution for the intersection line of two planes 1. Plot plane ehf and JHK 2. Link oh and extend it to the primitive circle at g 3. Count the plunge direction of g on the primitive circle and the plunge angle gh K on the WE linesolution for the intersection line of two planes 1. Plot plane EHF and JHK 2. Link OH and extend it to the primitive circle at G 3. Count the plunge direction of G on the primitive circle and the plunge angle GH on the WE line