Mathematics for IGCSE & O level - Geometrical Terms (Section 5 - No. 23)
Which of the following describes an obtuse angle?
An angle less than 90 degrees
An angle equal to 90 degrees
An angle between 90 and 180 degrees
An angle greater than 180 degrees
Explanation
An obtuse angle is defined as an angle greater than 90 degrees but less than 180 degrees.
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