flat angle

[/flæt ˈæŋɡəl/]
nounpl: flat angles
ângulo raso
1. An angle that measures exactly 180 degrees, formed by two rays extending in opposite directions from a common point, creating a straight line
A flat angle is formed when you extend two rays in completely opposite directions from the same vertex.
Um ângulo raso é formado quando você estende dois raios em direções completamente opostas a partir do mesmo vértice.
2. In geometry, an angle equal to π radians or 180 degrees
The sum of the angles on one side of a straight line equals a flat angle of 180 degrees.
A soma dos ângulos de um lado de uma linha reta é igual a um ângulo raso de 180 graus.
This is primarily a mathematical and geometric term used in educational contexts in both Brazil and Portugal. It is fundamental to geometry curricula and is taught in middle school mathematics. The term 'ângulo raso' is universally understood in Portuguese-speaking countries among students and mathematicians.
Synonyms / Sinônimos
straight angle180-degree anglesupplementary angle pair
Antonyms / Antônimos
acute angleright anglereflex angle

Regional Variations

General Brazilian
ângulo raso
Standard mathematical term used throughout Brazil
Portugal
ângulo raso
Same terminology as Brazilian Portuguese
USA/International
straight angle
Alternative English term, though 'flat angle' is also commonly used in mathematics education

Related Words

anglegeometryradiandegreevertexray
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