Thanks for the nice comment. :) Truth is, I don't know why I used the pependicular line. The good news is, although I didn't explicitly prove the angle bisector theorem, I proved a generalization of the formula. It works if you draw a line through a vertex of a triangle through any point on the opposite segment. Thanks for pointing out te error! :) Later I'm going to try another video demonstrating how to represent functions and their derivatives, it's cool, and I'm 100% sure I didn't mess up.
Thank you for posting your video. It was clear and your verbal instructions were easy to follow. I wanted to ask you why you used an altitude or perpendicular line from <BAC to line BC instead of a perpendicular bisector? I am new to Sketchpad and your exampled was a big help.
Thanks for the nice comment. :) Truth is, I don't know why I used the pependicular line. The good news is, although I didn't explicitly prove the angle bisector theorem, I proved a generalization of the formula. It works if you draw a line through a vertex of a triangle through any point on the opposite segment. Thanks for pointing out te error! :) Later I'm going to try another video demonstrating how to represent functions and their derivatives, it's cool, and I'm 100% sure I didn't mess up.
thisismyname891 3 years ago
Dear Thisismyname891,
Thank you for posting your video. It was clear and your verbal instructions were easy to follow. I wanted to ask you why you used an altitude or perpendicular line from <BAC to line BC instead of a perpendicular bisector? I am new to Sketchpad and your exampled was a big help.
Cheers,
Jollypair
jollypair 3 years ago