School has taught me so many helpful life lessons,

Like I don't know what a mortgage is or what a tax refund is or how you even do taxes,

But, I know how to graph an imaginary number on a coordinate plane.

Well, knowing the impossible helps you greater understand the possible. To make it a bit simpler, what if you didn't know the that a triangle with (example) 40cm, 40cm, and 100cm was not possible? It could completely mess up whatever your doing. Maybe planning a layout for a minecraft house or something like that. Or maybe I just really like math.