A plain-English guide to the basics of trig Trigonometry deals with the relationship between the sides and angles of triangles... mostly right triangles. In pra

Endorsements: Dr. Montgomery's latest book is one that every serious reader interested in clear Christian thinking should have on a table near her most comforta

How do you measure the size of the planet you're standing on? "Circumference" is the story of what happened when one man asked himself that very question. Nicho