Work Step by Step
We know that the length of the arc is: $$s=r\theta$$ Where theta is in radians. Thus, we find: $$s=(20cm)(.25\pi)=15.7\ cm$$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.