Question

Find the measure of arc AB. 

Answer 1

AB = 3π units

Explanation:

The arc length is calculated as

AB = circumference of circle × fraction of circle

= 2πr ×
`(45)/(360)`

= 2π × 12 ×
`(1)/(8)`

= 24π ×
`(1)/(8)`

= 3π units