Each time you add a row, 100 darts will be shot at random at this image. You can use this to calculate the value of Pi.
Check out "Physics Girl's" movie on this:
Youtube: Physics Girl Calculates Pi using darts
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Count inside the circle:
78
of 100 total darts
Current Estimate for Pi:
3.12
based on
100
throws
Throws
Hits
Proportion
Estimate
100
78
0.78
3.1200000