Respuesta :

Answer:

127.23

Step-by-step explanation:

  • Since it is a semicircle, it means that it is half a circle
  • Use the formula [tex]A=\frac{\pi r^{2}}{2}[/tex], where A is the area and r is the radius
  • Radius is half diameter, so it would be 9
  • Substitute in values
  • [tex]\frac{81\pi}{2}[/tex]=127.23

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