Geometry homework, ! i dont know how to do this.

Number 3 so the arc length would be half of the circumference right?circumference is 2Pi r so the arc length would be half of the circumference meaning just Pi r so the arc length is 8Pi.sector Area would be half to PI r^2 which would be 32Pi because 8^2 is 64 divided by 2 is 32. 1) arc length would be (360/40)2Pi r which in this case r is three so the answer is 54Pi. Sector are would be (40/360) Pi r^2 which ends up being 1Pi or just Pi. 2)repeat the process arc length (360/260)2 Pi r but r is 6 so the arc length would be 27Pi and sector are would be (260/360) 2 Pi r which would be 8 and 2/3 Pi