its a different type of anxiety when u taking a s h i t in school and someone walks into the bathroom

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

If your (k12) then it's all of them.i learned it the hard

Iwill need more information if this is a serious question but if you are really looking to meet someone with similar interests you should try omegle.