Green area is;
Area circle with radius 5 units + 2(area sector with radius 20 units and angle 60°) - Area equilateral triangle with side 20 units.
= π(5²) + 2(60÷360*20²π) - ½(20²)sin60
= 25π + ⅓(400π) - 100√(3)
= ⅓(475π-300√(3)) square units.
= 324.213756061 square units.
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