We have an Intro to Matrix Operations at the beginning of Algebra 2.
Here’s my unit organizer. Targets are based on Quality Core Standards.
I remember being shown this trick to use “determinants” to find area of polygons in a plane.
But why does it work? Sure it’s a nice quick trick, but why?
Also, we evaluate determinants and use them to find inverses…but what is the value really? What have I actually found when I do this process?
Maybe I once knew. I don’t know now. But I’d like to know why because my kids will ask. And I want to do better than in the past.