An angle of 90 degrees is called a right angle.
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commonly called a right angle
Angle b is acute angle, if any angle less than 90 degrees then it is called acute angle if more than 90 degrees then it is obtuse angle if it is equal to 90 degrees then it is right angled
A Right Angle is 90 degrees.
A Right Angle.
NO. An obtuse angle is over 90 degrees, but under 180 degrees. Acute angle is under 90 degrees.