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.
role in. Nathan Hale, (born June 6, 1755, Coventry, Connecticut [U.S.]âdied September 22, 1776, Manhattan Island, New York), American Revolutionary officer who attempted to spy on the British and was hanged. He attended Yale University, where he graduated in 1773, and became a schoolteacher, first in East Haddam and then in New London.