Given OA = 7 cm
Area of small circle = πr^{2}
Where r = 7/2
∴ Area of circle = 22/7 × 7/2 × 7/2
= 77/2 = 38.5 sq. cm.
Area of two shaded segment = Area of big semi-circle – Area of △CBD
= 1/2π × 7^{2} – ½ × 7 × 14
= ½ × 22/7 × 49 – 7 × 7
= 11 × 7 – 7 × 7
= 77 – 49 = 28 sq. cm
∴ Total shaded Area = 38.5 + 28
= 66.5 sq. cm.