acute triangle
[/əˈkjuːt ˈtraɪæŋɡəl/]
nounpl: acute triangles
triângulo acutângulo
1. A triangle in which all three interior angles are less than 90 degrees (acute angles)
An acute triangle has all angles measuring between 0 and 90 degrees.
Um triângulo acutângulo possui todos os ângulos medindo entre 0 e 90 graus.
2. In geometry, one of the three main classifications of triangles based on their angles
The mathematician classified the figure as an acute triangle because each angle was smaller than a right angle.
O matemático classificou a figura como um triângulo acutângulo porque cada ângulo era menor que um ângulo reto.
This is a standard geometric term used universally in mathematics education across both Brazil and the United States. It appears in textbooks, curricula, and standardized tests. There are no cultural variations in its usage—it is a technical, discipline-specific term with consistent meaning across English and Portuguese-speaking countries.
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