On the video, the rapper known as 2 Pi reels off rhymes as teenagers in classrooms and hallways sway and bop to the music. It's upbeat. It's catchy. It's . . . math. We solve triangles one by one We ...

Sure! Here's the cleaned-up description without any links: --- Subscribe! Want more math video lessons? Visit my website to view all of my math videos organized by course, chapter, and section. The ...

Well, what is the best way to cut a sandwich in half? Surely triangles don't really have "more sandwich," right? That's geometry and the law of conservation of matter. But something about the ...