Respuesta :

Chelboy

Answer:

Length of arc is 2π

Step-by-step explanation:

Length of arc=¤/360 x 2πr

Where:

¤=angle

r=radius

length of arc=90/360 x 2xπx4

Length of arc=1/4 x 8π

Length of arc=8π ➗ 4

Length of arc=2π

Answer:

6pi

Step-by-step explanation:

Khan