Anything less than 90 degrees. Over 90 degrees is an obtuse angle and anything under 90 degrees is an acute angle.
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89.999... degrees. An acute angle is any degree under 90.
its Less than 90 degree
A non negative angle which is less than 90 degrees is an acute angle. So, Zero degree is an acute angle.
Is 65 an acute angle
No triangle can ever have more than one 90-degree angle. An acute triangle has none.