^ Now that is cool!
Square root of pi is 1.772. Either B to C or A to D scales.
Lay the cursor on the teeny-tiny mark for pi, and see for yourself.
Actual value 1.7724538509055160272981674833411 according to the Win calculator. Using control + I blew the screen up quite a bit and started to notice little "hops" in sliding the scales and cursor around.