An acute angle has between 0-90 degrees (exclusive, i.e. greater than 0° and less than 90°).
it is anything less than 90 degress
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An angle is acute when it is under 90 degrees.
An angle is obtuse when it is above 90 degrees.
When the angle is 90 degrees it is called right.
An angle of 60 degrees is an acute angle
An acute angle is any angle that is less the 90 degrees. For example 2 degrees is and acute angle and so is 77 degrees. So the answer to your question would be X is anything greater than 0 and less than 90.
A complement of an acute angle must be an acute angle. An acute angle is an angle whose measure is more than 0 degrees but less than 90 degrees. For example, even if the angle was the minimum 1 degree, the complement is still 89 degrees, which is still acute. Therefore, any combination of a complement of an acute angle MUST be acute.
Acute
Complementary angles total 180 degrees. So if the obtuse angle is 145 degrees, the acute angle is 35 degrees.