The angle measure is nothing but the angle that is created with the help of the arc at the middle at the circle. To denote the same, the arc is preceded with the help of a lowercase letter M ( indicating Measure ). For example, m＾
(PQ)= 90˚ cm is read as “ the measure of the arc PQ is equal to 90˚ degrees.”
When you measure the arc length in degree, the formula is given by:
s = 2 *𝛑* r ( Ө/360 )
When you measure the arc length in radians, the formula is given by:
s = r * Ө
Where,
s – is the arc length
Ө – denotes the central angle of the arc in measure/radians
r – is the radius of the arc