Quote:
Originally Posted by Kelly Pedersen
With all the math apps and such available online or on smartphones or whatnot these days, I think it's actually easier to do the math of "what's the area of the shape you want to cover, ok now divide that by 12 square yards, that's the size of the Wall you need to cover it", rather than trying to figure out "ok, how many Walls do I need to make this flat section, then this section, then that one...".
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I don't think you need an app, the area of a half-sphere is 2(pi)r^2. So you need a wall with area [(pi)r^2]/6 to make any half-sphere of radius r in yards with the +60% Wall (note that if you plan to stand in the center, r should be at least your height).