What is "isogonal"

a. 1 (context cartography navigation English) Describing lines connecting points on the earth's surface whose magnetic declination is identical. 2 (context geometry English) Having equal angles.

Isogonal is a mathematical term which means "having similar angles". It occurs in several contexts:

• Isogonal polygon, polyhedron, polytope or tiling.
• Isogonal trajectory in curve theory.
• Isogonal conjugate in triangle geometry.

An Isogonal is also the name for a line connecting points at which the magnetic declination is the same.