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Acute means sudden or severe. Acute symptoms appear, change, or worsen rapidly. It is the opposite of chronic.
Acute is in math, more likely in the geometry area. Acute angles are angles that are less then 90 degrees.
A square has no acute angles but it does have 4 right angle corners.
'Acute' means sudden onset or short course, as opposed to 'chronic' which means long duration or frequent recurrence.
An acute angle measures less than 90 degrees.
