Question

PLLLLEEEAAAASSSSSEEEE HELP!

Answer 1

see explanation

Explanation:

The length of the arc is calculated as

arc = circumference of circle × fraction of circle

= 2πr ×
`(90)/(360)` ← r = 1

= 2π ×
`(1)/(4)` =
`(\pi )/(2)` ≈
`(3.14)/(2)` = 1.57