Help me please I will give brainliest answer please help ASAP

Answer:
26.3
Step-by-step explanation:
Perimeter of the rectangle (not including the dotted line): 4 + 8 + 8 = 20
Perimeter of the semicircle (not including the dotted line): [tex]\pi r=2\pi =6.283[/tex]
Add together: 20 + 6.283 = 26.283 ≈ 26.3