180 degrees
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Dihedral angle
order of rotation of semicircle is 1. angle of rotation of semicircle is 360 degree. If you want to find angle of rotation of a shape, then divide 360 from order of rotation of a shape.
What is the angle of rotation of alphabet S
Yes, a rectangle has no acute angle (i.e. no angle less than 90 degrees).
No, a rectangle cannot have an obtuse angle. By definition, a rectangle is a quadrilateral with four right angles (90-degree angles). An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees. Therefore, in a rectangle, all angles must be right angles, making it impossible for an obtuse angle to exist within a rectangle.