Special thanks to Captain Nemo and Vollketten.
Thanks to Rita Gamer for Edits and Publishing
Both Armored Warfare and World of Tanks have invented how certain shells work in the game that doesn't follow the real world model. In WoT’s higher tiers this leads to medium tanks either feeling weakly armored, dissimilar to reality, or medium tanks getting buffed armor in the game compared to reality. Armored Warfare on the other hand has very low penetration guns compared to reality, with overarmored MBT sides and semi-historical weakspots.
Anyone who knows anything about Cold War tanks may be confused by the lack of armor in high tier mediums in World of Tanks. For instance, when a T-55 was driven onto an embassy during the 1956 Hungarian revolution, analysts were shocked by the T-55s 100mm of upper glacis armor. They realized how effective this would be at bouncing or absorbing shots, with the hull’s front upper plate being angled at a very sloped 60 degrees.
The T-55 scare created the need for the famous 105mm L7 anti-tank gun and played a defining role in early western tank design. However, using trigonometry and middle school mathematics, anyone can find the hull of the T-55 is only 200mm thick in Line-of-Sight terms (henceforth known as LoS). A flat piece of 100mm armor is 100mm thick for a round hitting it at 90 degrees. Tilt that 100mm armor and the same shell hitting it from the same angle now has to travel through more armor. This is illustrated below.