An acute angle is greater than 0 but less than 90 degrees
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An acute angle is an angle less than 90°.
An acute angle by definition, is an angle that measures anywhere from 1º (or less) to 89º as long as it is smaller than a right angle (90º).
-- An 'acute triangle' is a triangle in which each of the three interior angles is an acute angle. -- Each of the three interior angles in every equilateral triangle is a 60-degree angle. -- Any angle of less than 90 degrees is an acute angle. -- It sure looks like every equilateral triangle does fit the definition of 'acute triangle'.
1 acute angle = 1 acute angle
An acute triangle is a triangle with all angles acute (for example, a triangle with angles 64 ,36, and 80). An acute angle is an angle less than 90 degrees. Also, all angles in a triangle MUST sum to 180 degrees.