![]() ![]() A paper airplane folded with this paper shape will look different than one folded with regular letter paper. If you cut it in half, the new piece will have an aspect ratio of 1.5 which doesn't do us any good. But don't worry, we'll help you do the math. If you happen to use Letter Paper, it's not so easy. Now, just fold your tiny airplanes! Letter Paper Resizing With one piece of paper you can make four or five smaller pieces, each one with the exact same aspect ratio. Cut one of those in half to make an A6 and so on. ![]() Simply, cut your A4 paper in half to make two pieces of A5. We can use this mathematical convenience to make smaller pieces of paper with the same dimensions. Halve it twice more and you are back to our standard A4 paper. ![]() Cut in half again and you get an A2 paper. By cutting this in half you get an A1 paper. In fact, it all starts with a larger piece of paper called A0 which is defined as having an area of 1m 2 and an aspect ratio of √2 (~1.414). If you are lucky enough to live in a place where A4 Paper is standard, then you are in luck! This size of paper was designed to be cut in half.
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