The correct option is option C i.e. "If the ratio of the arc length to r is 1, then the measure of θ is 1 radians".
What is Arc length?
The arc length is defined as the interspace between the two points along a section of a curve.
Here, we know that,
angle = arc length / radius ............(i)
If arc length / radius = 1 ............(ii)
then from eq. (i) and (ii), we get
angle = 1
θ = 1
Thus, The correct option is option C i.e. "If the ratio of the arc length to r is 1, then the measure of θ is 1 radians".
Learn more about arc length from:
https://brainly.com/question/16403495
#SPJ2
