semi-inscribed angle

[ˌsɛmi ɪnˈskraɪbd ˈæŋɡəl]
nounpl: semi-inscribed angles
ângulo semi-inscrito
1. An angle formed by a chord and a tangent line to a circle at one of the endpoints of the chord
The semi-inscribed angle is equal to half the arc intercepted by the chord.
O ângulo semi-inscrito é igual à metade do arco interceptado pela corda.
2. In geometry, an angle with its vertex on a circle, one side being a chord and the other side being a tangent to the circle
To find the measure of a semi-inscribed angle, divide the intercepted arc by two.
Para encontrar a medida de um ângulo semi-inscrito, divida o arco interceptado por dois.
This is a technical mathematical term used consistently across both Brazilian and American geometry curricula. It appears frequently in secondary and higher education mathematics courses, particularly in geometry and trigonometry classes. The term is specialized and maintains the same meaning across English and Portuguese-speaking countries.
Synonyms / Sinônimos
tangent-chord angleangle formed by tangent and chord
Antonyms / Antônimos
central angleexterior angle

Regional Variations

General Brazilian
ângulo semi-inscrito
Standard mathematical terminology used in Brazilian geometry education
São Paulo
ângulo semi-inscrito
Consistent with national standards in mathematics education
Portugal
ângulo semi-inscrito
Same terminology used in Portuguese mathematics curricula

Related Words

inscribed angletangent linechordarccircle geometry
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