- Vladimir Ilyich Lenin (Russian: Владимир Ильич Ленин), born Vladimir Ilyich Ulyanov (Russian: Влади́мир Ильи́ч Ульянов) (22 April 1870 (10 April (O.S.)) – 21 January 1924) was a Russian revolutionary, the leader of the Bolshevik communist party, the first Premier of the Soviet Union and the main theorist of Leninism. He married the revolutionary Nadezhda Krupskaya in 1898.
- Triangle (Wikipedia)
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry. A triangle with vertices A, B, and C is denoted △ABC.