If the angle subtended by an arc at the center of a circle is 45 degrees and the radius is 5 cm, then what is the length of the arc?
A. $2.5 \pi$ cm
B. $5 \pi$ cm
C. $7.5 \pi$ cm
D. $10 \pi$ cm
Answer:B
If the angle subtended by an arc at the center of a circle is 45 degrees and the radius is 5 cm, then what is the length of the arc?
A. $2.5 \pi$ cm B. $5 \pi$ cm C. $7.5 \pi$ cm D. $10 \pi$ cm