Round Hay Bale Prices. What does 1,000 to 1,200 pound round hay bales sell for in your area of the country. Next week, a neighbor is going to cut a few acres of hay for me and bale it in 1,000 to 1,200 pound round bales. This hay is mostly mixed grasses.
In geometry, the semiperimeter of a polygon is half its perimeter Although it has such a simple derivation from the perimeter, the semiperimeter appears frequently enough in formulas for triangles and other figures that it is given a separate name.
This article tells us the perimeter (also called circumference when talking about a full circle) of a full circle is given by 2*pi*r. Since we need the perimeter of a semicircle instead of a full circle, divide this by 2 (since the arc length is half) but then add the diameter, which is two times the radius (to account for the straight part across the bottom). So, perimeter of semicircle = (2*pi*r)/2 + 2r = (2 + pi)r.