Definition

1. Adjective:
   • Having or making equal angles: Describes lines or curves that intersect at equal angles. This term is primarily used in mathematics, geography (cartography), and navigation.

Usage

• The term "isogonic" is a technical adjective used in specific scientific contexts. It modifies nouns to indicate that the subject possesses the property of equal angles.
• It is most commonly encountered in the phrase "isogonic line" (or "isogonic"), which refers to a line on a map connecting points of equal magnetic declination.

Examples

• Adjective:
  • The cartographer drew isogonic lines to show areas with identical magnetic variation.
  • In geometry, two curves that intersect at constant angles are described as isogonic.

Advanced Usage

• "Isogonic chart": A map featuring isogonic lines, used primarily in aviation and maritime navigation.
  • Pilots consult an isogonic chart to correct for magnetic compass deviations.

Variants and Related Words

• Isogon (noun): A polygon with all angles equal.
  • A rectangle is an example of an isogon.
• Isogonal (adjective): A synonym for "isogonic," meaning equal-angled.
  • The transformation preserved the isogonal property of the figure.

Synonyms

• Equiangular: Having equal angles (more common in general geometry).
• Isogonal: Equal-angled (used interchangeably with "isogonic" in mathematics).

Notes on Different Meanings

• The core meaning of "isogonic" is consistently related to equal angles. Its application differs by field:
  • Mathematics/Geometry: Describes figures or curves intersecting at constant angles.
  • Geomagnetism/Navigation: Almost exclusively used to describe lines of equal magnetic declination on maps. In this context, "isogonic line" is often shortened to "isogonic."

Adjective

1. having or making equal angles