[yudlejoza]

When it comes to measurement, 1.7320 is not the same as 1.732

The trailing zero was part of the measurement and, hence, is included in the significant digit count.

That also means you can't just measure 1.7320, and report 1.73200 instead (or 1.732). You have to report only, and exactly, what you measured.

(I'm ignoring rounding in what I said).