Question

Please look at picture for accurate description! Thank you for the help!

Answer 1

r = 11 in.

central angle is 360/10 = 36°

drawing a rough sketch, the median to the line between the holes,from the center if the circle, is a perpendicular bisector of that line.

Then:

sin(18°) = (X/2)/11

11 x sin(18°) = x/2

X = 22 x sin(18°) = 6.8 in