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.
Introduction. Daniel Boone was a famous American pioneer, best known for exploring and settling Kentucky. Daniel was born on October 22, 1734 near present-day Reading, Pennsylvania. He was the son of a Quaker weaver and blacksmith and had 10 brothers and sisters.