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自製量角器 (英) : 畫植物 [Being a Plant] 的後續 ( http://youtu.be/lOIP_Z_-0Hs )
相關課程
- So if you're like me you probably don't carry around a protractor everywhere you go
- and even if you do, you sometimes you want to have only the angles you want, because you needed a whole bunch
- without all those other degrees getting in the way. This is the need that the Angle-A-Tron fufills.
- A protractor is kinda like a 180 degree Angle-A-Tron. It's great at 180 degrees.
- You can make your own 180 degree Angle-A-Tron super easily from any piece of paper.
- Even if your paper doesn't have an edge, you can just fold it and ta-da Angle-A-Tron!
- One extremely useful Angle-A-Tron is the 90 degree Angle-A-Tron.
- Many pieces of paper come pre-equipped with one of these,
- but, if they dont, you can get one by folding a 180 degree Angle-A-Tron in half.
- Now, you can draw all sorts of "rectangley things" and "perpendicularites".
- Following the "fold stuff in half" method you can get a 45 degree Angle-A-Tron pretty easily,
- or a 22.5 degrees, or a 11.25, and so on.
- And you get these weird looking numbers, but that's only because we started with something
- arbitrary, like 360 degrees, when, really the numbers we are looking at
- are a half, a fourth, an eighth, a sixteenth,
- you know, one over two to the n. It's not hard to fold paper into thirds, either.
- Might take a litte evening out, then BAM!
- 180 degrees turns into 60 degrees, good for making equilateral triangles.
- Or put two together and get 120 degrees, a very common and useful angle.
- For when, say, bubbles meet, If you're drawing bubbles. Or honeycombs, or something.
- Then you can start adding them together, 135 degrees is easy, 90 degrees plus 45 degrees.
- Now you can make puzzles for yourself. Say you make a 60 degree Angle-A-Tron, and a 135 degree Angle-A-Tron,
- How do you make an Angle-A-Tron that completes the circle?
- Or, if a friend gives you an Angle-A-Tron, can you make a Complementary, or supplementary, I forget which is which,
- 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
- your Angle-A-Tron. And now, I have a 60 degrees, and another 60 degrees, which comes over here,
- to make another 60 degrees, and now I have an equilateral Triangle Polygon-A-Tron!
- And just in case you thought that wasn't going to far, Why not make that a Polyhedron-A-Tron?
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