Is a 0 degree angle acute or obtuse?

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bandmanjoe eNotes educator| Certified Educator

An angle is the result of rise over run as graphed on an intersecting x and y axis.  The varying angles that are the result of the graph of rise over run, or y/x, all have different names.  An angle that is a quarter turn, which would represent a direct intersection of the x and y axes, is called a right angle, or 90 degree angle.  An angle which is less than 90 degrees, such as 0 degrees in your question, is called an acute angle.  An angle that is a straight-line graph, that runs congruently with the x axis, is a straight angle, which represents 180 degrees.  This angle also represents a half-turn, as it is one-half of a circle.  An angle that is less than 180 degrees, but more than 90 degrees, is called an obtuse angle.  An angle that represents three-quarters of a turn measures 270 degrees.  And an angle that represents a whole turn, a complete revolution of the x and y axes, is 360 degrees, right back to the zero starting point we started with on the x axis. 

ik9744 | Student

0 degrees would be an acute angle.

nisarg | Student

0 degrees would mean the "angle" is just and endpoint of something but it would technically be called an acute angle

ayeshanihal | Student

0 degree is an acute angle.

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