Pronunciation change

Adjective change

Positive
obtuse

Comparative
obtuser

Superlative
obtusest

Positive
obtuse

Comparative
more obtuse

Superlative
most obtuse

 
The angle marked β is obtuse as it is greater than 90° but less than 180°
  1. If an angle is acute, it is more than 90 degrees but less than 180 degrees in size.