How do you do number 4

Answer:
24pi
Step-by-step explanation:
Remark
You do it the same way you did the previous question
Formula
Area = (given angle/360) * pi * r^2
d = 2*r
Solution
2r = d
d = 16 inches
2r = 16 inches
r = 8
The given angle = 135
Area = (135/360) * pi * 8^2
Area = (0.375) * pi * 64
Area = 24 * pi