Calculating Shaded Area.
Shaded blue area is
Area quarter of radius 10 cm - Area sector of radius 10 cm and angle 30° - Area equilateral triangle of single side length 5 cm - Area sector of radius 5 cm and angle 120°.
= (¼(100π))-((100π)/12)-(¼(25√(3)))-(⅓(25π))
= 25π - ⅓(50π) - ¼(25√(3))
= (300π-200π-75√(3))/12
= (100π-75√(3))/12 cm²
= 15.3546212326 cm²
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