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
Simca Type 180 Renault/Peugeot Douvrin engine, but the displacement of the Simca 180 2.2-litre was slightly less. Later, this engine was also turbocharged, for use in the Citroën BX4TC and Peugeot 505 Turbos as the block was stronger than the Peugeot engine. Applications: Simca Type 180 The Type 180 is an automobile straight-4 engine produced in the 1970s. It was an OHC design. These engines (1,639/1,812 cc) were used in the Chrysler 160/180, a car also sold under a multiplicity of other names. Applications: The 1,981 cc Type 180 was most common. It was used in various Chrysler Europe and Simca models. Applications: