Question

me puedes ayudar xfavor?​

Answer 1

1.
A= pi x r^2
A1 - A2 = A3
A1= pi x 113^2 =40,114.9
A2= pi x 87^2 = 23,778.7
A3 = 16,336.2 cm^2
2.
A= lxl
A1-A2= A3
A1 = 40 x 40 = 1600
A2= 20x20 = 400cm^2
A3= 1200