Step-by-step explanation:
3a permieter
16+16+8+8+8+16+8 = 80
area = (16x16) +(8x8)= 256 +64 = 320
3b permieter: 10+ (2π3)/2 = 19.42
area1/2(6)(4) = 12
π (3)^2 = 28.26/2 + 12 = 26.13
