That is an important theorem in geometry: if two lines intersect to form adjacent congruent angles, then the lines are perpendicular. Those congruent angles would be right angâ¦les.
Williams later became chief surgeon of the Freedmenâs Hospital. Daniel Hale Williams III was born on January 18, 1856, in Hollidaysburg, Pennsylvania, to Sarah Price Williams and Daniel Hale Williams II. The couple had several children, with the elder Daniel H. Williams inheriting a barber business.
Captain Nathan Hale (1755 - 1776) On a September morning in 1776 a 21-year old American captain faced the most trying moment of his young life. He was shortly to die -- and to die the death of a criminal, of a traitor -- he was to hang, convicted without benefit of a trial.