Angle trisection drawn through formula_25 to the semicircle, resulting in the intersection formula_28. The angle formula_48 generated by formula_49 and formula_50 is the angle formula_51 sought. Another means to trisect an arbitrary angle by a "small" step outside the Greek framework is via a ruler with two marks a set distance apart. The next construction is originally due to Archimedes, called a "Neusis construction", i.e., that uses tools other than an "un-marked" straightedge. The diagrams we use show this construction for an acute angle, but it indeed works for any angle up to 180 degrees. This requires three facts from geometry (at
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: