How many panels do I need for a round pen?
PI times the diameter is what circumference is.If you have a 40 ft round pen, take 40ft by PI and divide it by 40.That is the current size of your body.You want a pen that is 50 feet long.That is the measurement you want.Subtract your first result from your second.You need to add that length to the circumference.Divide the length by either 10 ft or 12 ft to get the number of panels.
Stand in the center of the area where you plan to put the pen and hold the rope.If you want to draw a circle, tie a stick to the other end and have someone circle around you.The method works.This method is used for setting up ranch sorting pens.