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1话题日前在农村行走,观一农民自己在砌一简易房屋,地基放样时,只见他拉了两条互相交叉的线绳,然后以两条绳子的交点为始点用尺在两绳上各取了30cm和40cm,之后又在尺上取了50cm,不停地在两根线上比划、调整两线的方向位置,一会儿停下来,开始在砌墙.看后,我很快明白,他是在运用勾股定理的逆定理,找一个直角,使相邻两墙相互垂直.这位农民看上去已有50多岁,距离学习勾股定理知识也有30余
A topic recently walked in rural areas, the concept of a peasant in the construction of a simple house, foundation lofting, I saw him pull two intersecting lines, and then to the point of intersection of two ropes with a ruler on both sides of the rope Take 30cm and 40cm, and then took 50cm on the ruler, kept in the two line gestures, adjusting the direction of the two lines, while stopped to start the wall. Look, I quickly realized that he Is to use the inverse theorem of the Pythagorean Theorem to find a right angle so that the two adjacent walls are perpendicular to each other.The farmer looks more than 50 years old and has more than 30 learnings from the Pythagorean Theorem