Arc cd is 1/4 of the circumference of a circle. what is the radian measure of the central angle?

radians

Step-by-step explanation:

We can use the concept of proportion to answer this question.

The arc CD is given to be 1/4 in measure of the circumference of the circle. A complete circle is 360 degrees in measure which in radian measure is 2π

So, the arc which 1/4 in measure of the circumference will make an angle which is 1/4 of the angle of the entire circle.

i.e.

Angle formed by the arc = radians

Therefore, the radian measure of the central angle of arc CD is radians

step-by-step explanation:

it's is b

the answer is c

hope this !