Rain in the real world and GURPS MAGIC

[maximara]

Originally Posted by whswhs

The area of a single hex is 0.87 square yards. I usually take "one hex radius" to mean that single hex plus the hexes adjacent to each of its six sides, which is seven hexes or 6.09 square yards; two hex radius adds 12 more hexes, for 19 hexes or 16.53 square yards; three hex radius adds 18 hexes, for 37 hexes or 32.19 square yards. The formula for radius N is N(N+1)/2 + 1 hexes.

That differs from how Basic Set explains it on pg 239. Per the diagram the formula for hexes is 3r^2 - 3r + 1 or 3N(N-1) +1

It all depends on how the circle is placed on the hexagon. It is either a(√3)/2 for circle inside hexagon or ((3*√3)/2)*a^2 for hexagon inside circle.

If the area of a hex is exactly 1 yd then we have √(1/2.598) or 0.6204 for the circumradius