Pentagon is about 36 times smaller than Central Park.

Central Park is approximately 3.41 km² (1.32 sq mi), while Pentagon is approximately 0.096 km² (0.037 sq mi), making Pentagon 2.81% the size of Central Park.
Tip: This to-scale comparison of Central Park vs. Pentagon uses the Mercator projection, which distorts the size of regions near the poles.
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