# SCALENE TRIANGLE

A triangle that has no congruent sides.

## Related Terms

### 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

### COTANGENT

The ratio of the shorter side adjacent to an acute angle of a plane right triangle to the side opposit

### COSINE

The ratio of the side adjacent to an acute angle of a plane right triangle to the hypotenuse. The expression NATURAL COSINE is sometimes used to distinguish the cosine from its logarithm (called LOGARITHMIC COSINE).