If the radius of a circle is 2 cm and the length of glare in a circle is 1 cm, then the distance between the midpoints of opposite arcs.
The distance from the center of the circle to the chord (that is, the distance from the center of the circle to the midpoint of the chord) = (the square under the root sign of 2-(1/2)) = 7 /2 of the root sign.
The distance from the center of the circle to the midpoint of the bad arc is radius =2.
So the distance from the center of the circle to the midpoint of the lower arc = 2- root sign 7 /2.
It would have been nice to enter this in word, but when I copied it here, I found that both the root number and the second party could not be copied, which was depressing!