P. C. D. calculation with vernier.

SORRY, FOR THE DELAY,
i cam with this video , hope you will learn a deeper into PCD calculation.
Enjoy, and make sure you write down the FORMULA.\
thankyou
BACKGROUND SONG : John Mayer - Rosie (instrumental)

[@arnulfomeredor4821]

if each holes has a different diameter how we going to get the spacing as reference in R1 or R2?thanks for your reply and i will appreciated