What's a "TS"?
Also, those black lines mean that every side with those lines on them is parallel. They obviously aren't so the diagram is wrong

what's a "vro"

Please g̶i̶v̶e̶ ̶u̶p̶ ̶t̶h̶i̶s̶ ̶s̶eat i̶f̶ a disabled person n̶e̶e̶d̶s̶ ̶i̶t̶

The 1 after it implies there was another one before it

The metric system was invented in 1795, which was after America was created. Before this, even the british people used feet and inches and stuff.