Figure formed by two rays meeting at a common point
Not to be confused with Angel.
This article is about angles in geometry. For other uses, see Angle (disambiguation).
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A green angle formed by two red rays on the Cartesian coordinate system
In Euclidean geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.[1]
Angles formed by two rays are also known as plane angles as they lie in the plane that contains the rays. Angles are also formed by the intersection of two planes; these are called dihedral angles. Two intersecting curves may also define an angle, which is the angle of the rays lying tangent to the respective curves at their point of intersection.
The magnitude of an angle is called an angular measure or simply "angle". Angle of rotation is a measure conventionally defined as the ratio of a circular arc length to its radius, and may be a negative number. In the case of a geometric angle, the arc is centered at the vertex and delimited by the sides. In the case of a rotation, the arc is centered at the center of the rotation and delimited by any other point and its image by the rotation.
geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed...
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functions of one or more angles. They are distinct from triangle identities, which are identities potentially involving angles but also involving side...
In geometry and trigonometry, a right angle is an angle of exactly 90 degrees or π {\displaystyle \pi } /2 radians corresponding to a quarter turn. If...
In geometry, a solid angle (symbol: Ω) is a measure of the amount of the field of view from some particular point that a given object covers. That is...
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angler in Wiktionary, the free dictionary. Angler may refer to: A fisherman who uses the fishing technique of angling Angler (video game) The angler,...
Look up angle of incidence in Wiktionary, the free dictionary. Angle of incidence is a measure of deviation of something from "straight on" and may refer...
Look up Anglic in Wiktionary, the free dictionary. Anglic may refer to: Something related to the Angles Old English language Other Anglic languages descended...
In fluid dynamics, angle of attack (AOA, α, or α {\displaystyle \alpha } ) is the angle between a reference line on a body (often the chord line of an...
Look up phase angle in Wiktionary, the free dictionary. Phase angle may refer to: Phase (waves), the angular displacement of a sinusoid from a reference...
In astronomy and celestial navigation, the hour angle is the dihedral angle between the meridian plane (containing Earth's axis and the zenith) and the...
different types of glaucoma, but the most common are called open-angle glaucoma and closed-angle glaucoma. Inside the eye, a liquid called aqueous humor helps...
A dihedral angle is the angle between two intersecting planes or half-planes. In chemistry, it is the clockwise angle between half-planes through two sets...
Pressure angle in relation to gear teeth, also known as the angle of obliquity, is the angle between the tooth face and the gear wheel tangent. It is...
angle of the mandible (gonial angle) is located at the posterior border at the junction of the lower border of the ramus of the mandible. The angle of...
Look up critical angle in Wiktionary, the free dictionary. Critical angle may refer to: Critical angle (optics), the angle of incidence above which total...
The Euler angles are three angles introduced by Leonhard Euler to describe the orientation of a rigid body with respect to a fixed coordinate system....
inscribed angle is the angle formed in the interior of a circle when two chords intersect on the circle. It can also be defined as the angle subtended...
Look up subtend in Wiktionary, the free dictionary. In geometry, an angle is subtended by an arc, line segment or any other section of a curve when its...
Eric Angle (born August 8, 1967) is an American former amateur and professional wrestler, better known to be the older brother of professional wrestler...
The contact angle (symbol θC) is the angle between a liquid surface and a solid surface where they meet. More specifically, it is the angle between the...
The venous angle (also known as Pirogoff's angle and in Latin as angulus venosus) is the junction where the ipsilateral internal jugular vein and subclavian...
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