3. Angles. ... For example, in the current SI, it is stated that angles are dimensionless based on the definition that an angle in radians is arc length divided by radius, so the unit is surmised to be a derived unit of one, or a dimensionless unit.

Is angle a dimensionless and Unitless quantity?

Angle is a geometrical figure which is formed when two lines or rays meet. It has units radians or degrees. Clearly A has units and is not the answer.

Does angle have any dimension?

An angle symbolically has dimension . For consistency in the Units package, angles have the dimension length/length(radius). The SI derived unit of angle is the radian, which is defined as the angle for which the radius equals the arclength.