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.
By Rev. Edward Everett Hale. Nathan Hale, a martyr soldier of the American Revolution, was born in Coventry, Conn., June 6, 1755. When but little more than twenty-one years old he was hanged, by order of General William Howe, as a spy, in the city of New York, on September 22, 1776.