planar angle
[PLAY-ner ANG-uhl]
nounpl: planar angles
ângulo plano
1. An angle formed by two rays or lines that lie in the same plane, measured in degrees, radians, or other angular units
The planar angle between the two intersecting lines is 45 degrees.
O ângulo plano entre as duas linhas que se intersectam é de 45 graus.
2. In geometry, the geometric figure formed by two rays emanating from a common point (vertex) contained within a single plane
A right angle is a planar angle measuring 90 degrees.
Um ângulo reto é um ângulo plano que mede 90 graus.
3. In solid geometry, the angle formed at the apex of a cone or the angle between two planes that intersect along a line, measured within a plane perpendicular to that line
The planar angle of the cone's surface can be calculated using trigonometry.
O ângulo plano da superfície do cone pode ser calculado usando trigonometria.
This is a technical mathematical term used consistently in both English and Portuguese-speaking educational systems. The term is standardized across Brazilian and Portuguese mathematics curricula and is essential vocabulary for students studying geometry, trigonometry, and engineering disciplines.
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