Respuesta :
Answer:
31 ft²
Step-by-step explanation:
(1) Area of square
A = l²
A = 12²
A = 144 ft²
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(2) Area of circle
A = πr²
A = π × 6²
A = π × 36
A = 113 ft²
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(3) Remaining area
A = 144 – 113
A = 31 ft²
The area of the remaining board is 31 ft².