Silver area is;
2(area rectangle with length 6 cm and width 3 cm - area quarter circle with radius 3 cm - area sector with radius 6 cm and angle 30° + area sector with radius 6 cm and angle 60° - area triangle with two length 6 cm each, and angle 60°).
= 2((6*3)-¼(9π)-(30*36π÷360)+(60*36π÷360)-½(36sin60))
= 2(18-(9π/4)-3π+6π-9√(3))
= 2(18+(3π/4)-9√(3))
= (36+(3π/2)-18√(3)) cm²
= 9.53547444414 cm²
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