Mathematics for IGCSE & O level - Geometrical Constructions (Section 2 - No. 3)
Which of the following describes an obtuse angle?
An angle between 0° and 90°
An angle that is exactly 90°
An angle between 90° and 180°
An angle that is exactly 180°
Εξήγηση
An obtuse angle is between 90 and 180 degrees.