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.
June 6, 1978 - By a vote of almost two to one, California voters approved Proposition 13, an amendment to the state constitution severely limiting property tax rates. Birthday - American patriot Nathan Hale (1755-1776) was born in Coventry, Connecticut.