exterior angle
[ɪkˈstɪriər ˈæŋɡəl]
nounpl: exterior angles
ângulo externo
1. An angle formed between one side of a polygon and the extension of an adjacent side
The exterior angle of a triangle equals the sum of the two non-adjacent interior angles.
O ângulo externo de um triângulo é igual à soma dos dois ângulos internos não adjacentes.
2. In geometry, an angle located outside a polygon at each vertex
Each exterior angle of a regular hexagon measures 60 degrees.
Cada ângulo externo de um hexágono regular mede 60 graus.
This is a technical mathematical term used universally in geometry education across English-speaking and Portuguese-speaking countries. No cultural variations in usage exist; it maintains consistent meaning in mathematics curricula in both Brazil and the United States.
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