# Seek Earth's Geography in Alg-Geometry

Geometry Level 3

Consider a semicircle with radius $$r$$ and a point $$P$$ on its circumference such that $$PA + PB$$ is maximum.

Then, find the area of the blue region if $$r=6370$$. (Radius of earth is 6370 km)

Use the approximation $$\pi = \dfrac{22}{7}$$.

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