Really need with these math can someone me?

1. a circle has a radius of 5.4 m.

what is the exact length of an arc formed by a central angle measuring 60°?



2. a circle has a radius of 4 ft.

what is the area of the sector formed by a central angle measuring 5π/2? (write answer as decimal.)

1) Arc length = radius * central angle (radians)
or we could say 60 degrees is (1/6) of a circle.  So it would be (1/6) of the circumference.  = 2*PI*radius / 6 = 2*PI*5.4 =
= 5.6548667765 meters

2) Arc length = radius * central angle (radians)

The central angle 5*PI/2 = 450 degrees (1.25 circles). So that sector area would be double for 25% of it.