Parallel Lines and Transversals - Geometry Made Easy!

[EhimenIria]

Ive watched nearly half of the playlist and it going great

[MisadventuresOfBecca]

I have to admit because of your videos I was able to study for my GED in one week and literally passed all four tests but the one test I knew I would have the hardest time with was math. I've always had trouble studying but your videos were perfect for the way I learn and especially since I have ADD I have an EXTREMELY HARD TIME reading after a while I'll be reading and my brain will start thinking of the most random stuff but watching the videos kept me very focused and I actually passed thank you so much!!! I could finally comprehend all the stuff I had so much trouble with in the past!!!

[darylcheshire]

I remember a practical application, in Melbourne Australia we used to have road rail intersections which were protected by interlocking gates. These are four gates which are controlled by a signalman in the signal box. The gates could be rotated 90 degrees one way or another to block cars from moving trains or close accross the train tracks to allow the passage of cars. In Cheltenham, Charmen Road crossed the railway line at roughly a 30 degree angle. This means that each pair of gates were not the same length. And they did not swing 90 degrees. And as they swung to pass cars or trains they fitted together but were different lengths. If they were too long or too short, they would hit each other. This I thought fascinating and I’d watch them before my train came.
I wondered that they would have been made in a depot before being assembled in situ so the maths would have to be spot on.
Alas they are gone now. The UK probably still have examples.