This is a great interactive note taking activity to keep your secondary students engaged. It includes fill-in-the-blanks, along with boxes for writing the formula as well as a space for a teacher presented example. I used this with special education geometry students and it worked really well for them as I walked them through it on the whiteboard. Plus they also had a completed product to use as a study guide for the test. 2 page .pdf document - answer key included.