Saccheri–Legendre theorem Saccheri–Legendre theorem In absolute geometry, the Saccheri–Legendre theorem states that the sum of the angles in a triangle is at most 180°. Absolute geometry is the geometry obtained from assuming all the axioms that lead to Euclidean geometry with the exception of the axiom that is equivalent to the parallel postulate of Euclid. The theorem is named after Giovanni Girolamo Saccheri and Adrien-Marie Legendre. The existence of at least one triangle with angle sum of 180 degrees in absolute geometry implies Euclid's parallel postulate. Similarly, the existence of at least one triangle with angle sum of less than 180 degrees
Six Degrees of Separation (play) by Fred Schepisi. Channing was nominated for the Academy Award for Best Actress for her performance in the film. Six Degrees of Separation (play) Six Degrees of Separation is a play written by American playwright John Guare that premiered in 1990. The play was nominated for the Pulitzer Prize for Drama and was nominated for the Tony Award for Best Play. The play explores the existential premise that everyone in the world is connected to everyone else in the world by a chain of no more than six acquaintances, thus, "six degrees of separation". A young black man named Paul