Hello Ron,
Your question implicitly explains why there are no great Roman astronomers or mathematicians but simply orators. Their numbering system barely allows any mathematics at all as they have perceived mathematics as an extension of their literary skills. That is why the M, L, C, D, X and V and no square roots! Eons before Romans, Aztecs calculated astronomical events down to its last minute because their numerals involved dots and small shapes which could all be added correctly. That is the why in fact Arabs using Indian numerals dominated in astronomy whereas Europe had no inkling of astronomical calculations. Also thank you for the compliment.
Regards
Ibrahim

One should not underestimate Roman engineering, a great network or roads connecting various parts of the empire, aqueducts, buildings including a pretty good sports arena (or arenas, but the big one in Rome is even impressive today). Did I mention concrete?

Heron (Alexandria) of Heron's formula for area and more, while a Greek. was part of the Roman empire.

Ptolemy related to planetary motion was also part of the Roman empire. I also think Pappus and Menelaus were also in the Roman empire.

I bet many have used one of Pappus theorms: http://mathworld.wolfram.com/PappussCentroidTheorem.html