Quandaries
and Queries 

My name is Chris, I work
for a custom fabricator company. The
picture shows dimensions for my current application. 

Hi Chris, Below is the diagram you sent us. If I understnd this correctly the circle has a diameter of 1.5 inches, so a radius of 0.75 inches, and the two points of tangency are 0.75 inches apart. I am going to call the center of the circle C and label three other points in the diagram below. The line CB is a radius of the circle and BA is tangent to the circle, hence the angle ABC is a right angle. The angle CAB is 60^{o}. The sine of 60^{o} is sqrt(3)/2 and hence
and BC = 3/4. Thus
PC is a radius of the circle so PC = 3/4. Thus
which is approximately 0.1160 inches. Cheers, 

