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.
-Mary Ann Daniel was born in 1828, in Patrick County. son of Fielding Phipps and Eleanor Ellison, on November 20, 1849, in Fayette County. They were married by Alfred Beckley. County, Virginia and died before 1870 in Raleigh County.