When the Geometry book can't be consistent

This is why it's important to read a book's definitions when helping a student whose class is using that book. Not all books define terms the same way. By the way, is this video resolution is low or slightly off from the usual horizontal video, blame Clipchamp. When I used to make a few videos a long time ago, I edited them in iMovie, but now I can't use iMovie on my phone because it claims to require complete access to all photos in order to work, and I think that's stupid. So, in other words, I could use it, but I'm refusing in protest. Then I did a 1-week trial of some app I already had on my phone for when I uploaded my recent video on trig function names. And today since I knew Clipchamp was included in my Office 365 subscription I decided to try that... But despite filming every single video horizontally on my phone, Clipchamp made them all into vertical videos with the image shrunken and with huge black bars on top and bottom. So, I just manually cropped the video to look approximately correct and then uploaded this cropped version. Also, Clipchamp seems to have added in some transition noises at the end of clips. 🤷‍♂️ I guess I'll find some other video editing software soon. But I'm not going to re-edit this one. Brand new math rant videos coming... sometime!