Type 95 Heavy Tank into production. It proved to be a complicated design with poor mobility and had a lower top speed than desired. Modeled on German and Italian tank designs, this tank featured 3 turrets. Mounted in the central turret was the primary weapon of Type 95, a Type 94 7 cm tank gun specifically designed for it. The cannon could fire both Type 92 high-explosive shells and Type 95 armor-piercing shells. The gun elevation angle was 20 degrees and gun depression angle was -12 degrees. A 6.5 mm machine gun was also mounted in the main turret. Two addition turrets gave Type
Space (mathematics) projective geometry nor defined from the notions mentioned there. The question "what is the sum of the three angles of a triangle" is meaningful in Euclidean geometry but meaningless in projective geometry. A different situation appeared in the 19th century: in some geometries the sum of the three angles of a triangle is well-defined but different from the classical value (180 degrees). Non-Euclidean hyperbolic geometry, introduced by Nikolai Lobachevsky in 1829 and János Bolyai in 1832 (and Carl Friedrich Gauss in 1816, unpublished) stated that the sum depends on the triangle and is always less than 180 degrees. Eugenio Beltrami