If I understand the question correctly, the answer is that it is simply a case of convention. For bearings, for example, the reference line is North and angles are measured clockwise. In 2-D polar coordinates, the reference line is the horizontal (going East) and angles are measured in the anti-clockwise direction.
The angle of reference is in the first quadrant, and 90 degrees angle is not in the quadrant.
It is not. The angle of reference is 2*pi radians or 360 degrees.
Quadrantals are their own reference angle, so 90 degrees.
90 degrees
90 degrees
Yes. Quadrantal angles have reference angles of either 0 degrees (e.g. 0 degrees and 180 degrees) or 90 degrees (e.g. 90 degrees and 270 degrees).
A 30 degree angle is an acute angle because it is greater than 0 but less than 90 degrees.
A right angle is an angle of 90 degrees.
90 degreesThere are 90 degrees in a right angle.There are 90 degrees in a right angle
17 degrees is an acute angle because it's greater than 0 but less than 90 degrees.
there is 90 degrees in a right angle derdder :):):):):):):):):):):):):)
A right angle is an angle of 90 degrees.