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.
[A number of additional Entries will be added later]. 1734: The birth of Daniel Boone on Oct 22, the sixth child of Squire and Sarah Morgan Boone. He was born in a region called Oley, in Philadelphia County (now Berks County), Pennsylvania, approximately six miles east of present Reading, Pennsylvania.