Prerequisites for Marion Walter's Theorem
There are several ways to approach the problem and your approach will probably depend on which mathematical topics you are familiar with.
- You can use classical geometry. For that, you'll need a solid background in proportionality, areas of polygons, and similarity.
- You can use analytic geometry. You'll need to know how to find equations of lines and how to solve linear systems.
- You could use vector geometry. You'll need to know how to find vector equations of lines and how to use determinants to find areas.