Angles are classified into 4 categories and they are:-
1 Acute angle which is greater than 0 but less than 90 degrees
2 Right angle which is 90 degrees
3 Obtuse angle which is greater than 90 but less than 180 degrees
4 Reflex angle which is greater than 180 but less than 360 degrees
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A polygon that has 3 sides and 3 interior angles is a triangle
Right angle, obtuse angle, acute angle, supplementary angle, complementary angle, interior angle, exterior angle, adjacent angle
The angle of incidence
the angle of incidence is the initial ray angle and the angle of reflection is the reflected ray angle
It is a reflex angle