Vocabulary Test
A recent seller on Ebay advertised an 1845 text called An Introduction to Geometry and the Science of Form by Ann C. Lowell. Though I did not end up as high bidder, I was able to capture some information from the text that proves interesting.
How well do you know your mathematical terms? That is, what are your definitions of the following:
 lozenge
 rhomboid
 vulgar fraction
 reentering angle
 salient angle
 rectlineal figure
 annular surface
Some of these terms are still around today, but "lozenge" and "salient angle" were new ones to me. Look the terms up for some surprises.
