None of them because 180 degrees is a straight line.
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Acute angle = <90 degrees Right angle = 90 degrees Obtuse angle = >90 degrees To answer your question, obtuse angle is larger.
If it has an angle over 90 degrees, it's obtuse. If it has an angle exactly 90 degrees, it's right. Otherwise, it has three acute angles, and is acute.
No a right angle is not 45 degrees, that would be an acute angle. A right angle is exactly 90 degrees. Anything below is acute and above is obtuse.
Acute = less than 90 degrees Right = 90 degrees Obtuse = more than 90 degrees
It's less than a obtuse angle and right angle. A acute angle has degrees between 0 degrees and 89 degrees.