- Types:
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crotch, fork
the angle formed by the inner sides of the legs where they join the human trunk
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axil
the upper angle between an axis and an offshoot such as a branch or leafstalk
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helix angle
the constant angle at which a helix cuts the elements of a cylinder or cone
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complementary angles
two angles whose sum is a right angle
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angular distance
the angular separation between two objects as perceived by an observer
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plane angle
an angle formed by two straight lines (in the same plane)
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spherical angle
an angle formed at the intersection of the arcs of two great circles
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solid angle
an angle formed by three or more planes intersecting at a common point (the vertex)
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angle of inclination, inclination
(geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis)
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inclination, inclination of an orbit
(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees
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salient angle
an angle pointing outward; an interior angle of a polygon that is less than 180 degrees
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interior angle, internal angle
the angle inside two adjacent sides of a polygon
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exterior angle, external angle
the supplement of an interior angle of a polygon
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angle of incidence, incidence angle
the angle that a line makes with a line perpendicular to the surface at the point of incidence
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angle of reflection
the angle between a reflected ray and a line perpendicular to the reflecting surface at the point of incidence
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angle of refraction
the angle between a refracted ray and a line perpendicular to the surface between the two media at the point of refraction
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angle of extinction, extinction angle
the angle from its axis that a crystal must be rotated before appearing maximally dark when viewed in polarized light
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dogleg
angle that resembles the hind leg of a dog
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right angle
the 90 degree angle between two perpendicular lines
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oblique angle
an angle that is not a right angle or a multiple of a right angle
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reflex angle
an angle greater than 180 degrees (but less than 360)
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perigon, round angle
an angle of 360 degrees
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cutting angle
the angle between the face of a cutting tool and the surface of the work
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angle of dip, dip, inclination, magnetic dip, magnetic inclination
(physics) the angle that a magnetic needle makes with the plane of the horizon
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lead
the angle between the direction a gun is aimed and the position of a moving target (correcting for the flight time of the missile)
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magnetic declination, magnetic variation, variation
the angle (at a particular location) between magnetic north and true north
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AZ, azimuth
the azimuth of a celestial body is the angle between the vertical plane containing it and the plane of the meridian
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polyhedral angle
the space enclosed by three or more planes that intersect in a vertex
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face angle
the angle formed by two edges of a polyhedral angle
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tilt angle
the angle a rocket makes with the vertical as it curves along its trajectory
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vertical angle
either of two equal and opposite angles formed by the intersection of two straight lines
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angle of view, view angle
the angle included by a photographic lens
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wave angle
the angle of arrival (or departure) of a radio wave with respect to the axis of an antenna array
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latitude
the angular distance between an imaginary line around a heavenly body parallel to its equator and the equator itself
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longitude
the angular distance between a point on any meridian and the prime meridian at Greenwich
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celestial latitude, dec, declination
(astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere
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RA, celestial longitude, right ascension
(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere
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HA, hour angle
(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day
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true anomaly
the angular distance of a point in an orbit past the point of periapsis measured in degrees
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reentering angle, reentrant angle
an interior angle of a polygon that is greater than 180 degrees
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hip
(architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof
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angle of attack
the acute angle between the direction of the undisturbed relative wind and the chord of an airfoil
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critical angle
the smallest angle of incidence for which light is totally reflected
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acute angle
an angle less than 90 degrees but more than 0 degrees
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obtuse angle
an angle between 90 and 180 degrees