Question

In circle "R" below, determine the length of arc AB if BR = 5 units.

A. 31.4 units
B. 15.7 units
C. 11.775 units
D. 3.925 units

Answer 1

`l=2 \pi r( (degrees)/(360) )`


`l=2 \pi` × 5 ×
`(135)/(360)` = 11.78

Answer 2

See the pic, I'd solved in it.