It's true that transformation matrices are used a lot in 3D graphics, but to understand what you want to do (as opposed to how to get it done), you want to understand "descriptive geometry". IME ...

Imagine it’s a student’s first day of ninth grade in the San Francisco Unified School District in 2012. Let’s call her Veronica. On her schedule is a math class full of other ninth graders repeating ...

Across the country, educators continue to wrestle with big questions about math curricula. Two years ago, the California education board’s adoption of a long-gestating new math framework added more ...