Circle area ratio

Geometry Level 3

The diagram above shows a rectangle ABCD with length \(l\) and breadth \(b\).
A pink semicircle is inscribed inside this rectangle.
And a green circle is inscribed inside the region between the semicircle and the rectangle as shown.

\[ \dfrac{\text{area of the semicircle}}{\text{area of the circle}} . \]

Image Credit: Theroy vs Theories (facebook).

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