Respuesta :

Answer:

  877.5 cm²

Step-by-step explanation:

Altogether, the area is that of 12 triangles of base 13 cm and height 11.25 cm. The total area will be ...

  star area = 12×triangle area = 12×(1/2)(13 cm)(11.25 cm)

  star area = 877.5 cm²