Classify the following triangles as acute-angled, right angled or obtuse-angled according to the magnitude of their angles.
15°,75°90
As one of the angles of the triangle is equal to 90° , so it is a Right-angled triangle.
Classify the following as acute-angled, right-angled or obtuse-angled triangles according to the measures of their angles.
20°,40°and120°
Classify the angle as acute, obtuse, right, straight, reflex or zero angle.90°.
Classify the following triangles as acute, right or obtuse-angled triangles according to the magnitude of their angles.
90°,63°,27°
Classify the triangle as acute-angled, right-angled and obtuse-angled triangles on the basis of their angles which have been given below-:
75°,20°,85°
Classify the following measures of angles as acute , obtuse, right, straight, or reflex
(5) 90°