An example that a male junior high school student wanted to have such a textbook for mathematics might get absorbed in mathematics

A man who blushes a cheek for a beautiful woman sitting on a face-to-face seat by train. Inevitably the line of sight of a man is drawn to a mini skirt ... ... but this seems to be mathematical problem.

A man who holds his fist unexpectedly and is stooped. How long can you see the part that you can see but can not see if you stand out?

Details are as below. This is the problem. As it is written in Hangul, it seems to be Korean, so it is an image that is talked about on the internet as "Korean people are strong in mathematics!

http://img7.imageshack.us/img7/5152/japmath.jpg


Let's take a closer look. The height from the position where the women's knees touch each other to the edge of the skirt is 4 cm, the length from the base of the woman's foot to the rim of the skirt is 12 cm. It looks like a rather short skirt.


From the edge of the skirt to the position of the eyes of the man is 160 centimeters horizontally, 70 centimeters vertically. I can not see the part that I care about as it seems like this. How much should I turn back? It seems to be a problem.


This is the answer. The height of the man's eyes at that moment when rolling the back and rolling back and starting to look glittery is h, AB = AC = 4: 12 = 1: 3 = h: 160, so h = 160 ÷ 3 = 53.3333 ...


That's why it seems to be "visible" when the eye position is 53.3 cm high from the edge of the skirt. Because it is quite a cat back, the tactics which sit shallow in the seat and warp the upper body may be more natural. If the part which is 160 cm in the above figure is 210 cm apart, it is "visible" even if the spine is stretched, but in that case the distance becomes farther away, and a certain visual acuity is required ... ... It is a problem that is likely to create a considerable dilemma. Of course it is a crime to actually do it, but it is free to calculate.

It may be perfect for preaching the practicality of mathematics to this student who wants to call it "equations of chirismism", "students who do not use mathematics". It is unknown whether this is a textbook actually used in Korea, a reference book or a collection of problems, but in such a textbook, boys and junior high school students who always sleep during class in mathematics also shine their eyes to a problem You may work on it.

2009/04/12 01:21 Addendum
According to each story telling that it is rushing, although it is not possible to identify which book it is because there is no actual book at hand, apparently the original story of thisMr. Yuida Rika's "Fantasy Science War" seriesIt seems to be one of.