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The amount by which the sum of the three angles of a spherical triangle exceeds 180°.

Related Terms

CELESTIAL TRIANGLE

A spherical triangle on the celestial sphere, especially the navigational triangle

SPHERICAL TRIANGLE

A closed figure having arcs of three great circles as sides.

HYPOTENUSE

The side of a plane right triangle opposite the right angle; the longest side of a plane right triangle

AGETON

A divided triangle method of sight reduction in which a perpendicular is dropped from the GP of the body to the meridian of the observer

ALTITUDE AZIMUTH

An azimuth determined by solution of the naviga- tional triangle with altitude, declination, and latitude given. A time azimuth is computed with meridian angle, declination, and latitude given. A time and altitude azimuth is computed with meridian angle, declination, and altitude given

ASTRONOMICAL TRIANGLE

The navigational triangle either terrestrial or celestial, used in the solution of celestial observations.

ISOSCELES TRIANGLE

A triangle having two of its sides equal

CELESTIAL TRIANGLE

A spherical triangle on the celestial sphere, especially the navigational triangle

COSECANT

The ratio of the hypotenuse of a plane right triangle to the side opposite one of the acute angles o

COCKED HAT

Error triangle formed by lines of position which do not cross at a common point

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