This is a copy of the student notes and reference sheet I provide my students with at the start of class. I run the formulas reference sheet off on a separate, colorful page, so that students can easily find it for reference.
Then I go over the first page with them, basically showing them how to apply each formula. The "silly names" are just names I made up to help them remember them: the "hourglass," the "A-frame," and the "lucky 7" are the names I use to basically describe two intersecting