Students will learn what the side splitter theorem is, how to prove it, and how to use it. Here's a great intro and proof to the side splitter theorem, and here's an excellent video on how to use it. Before attempting this section, students should know how to solve proportions.
Conclude by giving your students these challenges:
- X Marks the Spot Puzzle by Math Equals Love
- Overlapping Annuli by NRICH
- Temperature by NRICH
- The Genie in the Jar by NRICH
- A Spelling Problem by Pierce School: Problem / Solution