WEBVTT 00:00:00.139 --> 00:00:04.204 So if you're like me you probably don't carry around a protractor everywhere you go 00:00:04.204 --> 00:00:08.609 and even if you do, you sometimes you want to have only the angles you want, because you needed a whole bunch 00:00:08.609 --> 00:00:14.248 without all those other degrees getting in the way. This is the need that the Angle-A-Tron fufills. 00:00:14.248 --> 00:00:19.987 A protractor is kinda like a 180 degree Angle-A-Tron. It's great at 180 degrees. 00:00:19.987 --> 00:00:23.359 You can make your own 180 degree Angle-A-Tron super easily from any piece of paper. 00:00:23.359 --> 00:00:27.294 Even if your paper doesn't have an edge, you can just fold it and ta-da Angle-A-Tron! 00:00:27.294 --> 00:00:31.602 One extremely useful Angle-A-Tron is the 90 degree Angle-A-Tron. 00:00:31.602 --> 00:00:34.935 Many pieces of paper come pre-equipped with one of these, 00:00:34.935 --> 00:00:39.039 but, if they dont, you can get one by folding a 180 degree Angle-A-Tron in half. 00:00:39.039 --> 00:00:42.543 Now, you can draw all sorts of "rectangley things" and "perpendicularites". 00:00:42.543 --> 00:00:47.180 Following the "fold stuff in half" method you can get a 45 degree Angle-A-Tron pretty easily, 00:00:47.180 --> 00:00:51.552 or a 22.5 degrees, or a 11.25, and so on. 00:00:51.552 --> 00:00:55.556 And you get these weird looking numbers, but that's only because we started with something 00:00:55.556 --> 00:00:58.692 arbitrary, like 360 degrees, when, really the numbers we are looking at 00:00:58.692 --> 00:01:01.562 are a half, a fourth, an eighth, a sixteenth, 00:01:01.562 --> 00:01:05.098 you know, one over two to the n. It's not hard to fold paper into thirds, either. 00:01:05.098 --> 00:01:08.035 Might take a litte evening out, then BAM! 00:01:08.035 --> 00:01:11.838 180 degrees turns into 60 degrees, good for making equilateral triangles. 00:01:11.838 --> 00:01:15.709 Or put two together and get 120 degrees, a very common and useful angle. 00:01:15.709 --> 00:01:18.912 For when, say, bubbles meet, If you're drawing bubbles. Or honeycombs, or something. 00:01:18.912 --> 00:01:25.085 Then you can start adding them together, 135 degrees is easy, 90 degrees plus 45 degrees. 00:01:25.085 --> 00:01:31.319 Now you can make puzzles for yourself. Say you make a 60 degree Angle-A-Tron, and a 135 degree Angle-A-Tron, 00:01:31.503 --> 00:01:35.462 How do you make an Angle-A-Tron that completes the circle? 00:01:35.462 --> 00:01:40.734 Or, if a friend gives you an Angle-A-Tron, can you make a Complementary, or supplementary, I forget which is which, 00:01:40.734 --> 00:01:46.186 Angle-A-Tron? And then, let me know if this is going a little bit too far, maybe you can put an Angle-A-Tron on 00:01:46.186 --> 00:01:51.655 your Angle-A-Tron. And now, I have a 60 degrees, and another 60 degrees, which comes over here, 00:01:51.655 --> 00:01:56.416 to make another 60 degrees, and now I have an equilateral Triangle Polygon-A-Tron! 00:01:56.416 --> 00:02:00.416 And just in case you thought that wasn't going to far, Why not make that a Polyhedron-A-Tron?