Answer:
128π - 8
Step-by-step explanation:
Hypotenuse length:
4² + 4² = 32
2π(√32/2)² = (√32)² × 2² = 2π × 32 × 4 = 2π × 128
256π is the area of the circle
Area of shaded region = area of circle/2 - area of triangle
256π/2 = 128π
128π - 16/2
128π - 8 = area of shaded region
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