(一)实验课题无理的图形(二)实验背景通过本次实验活动,同学们能进一步理解勾股定理和无理数之间的关系.本实验,同学们手脑并用,通过算一算,拼一拼的过程,感受二次根式在图形中的应用.活动的基本步骤为:1.学习如何在数轴上画长度为二次根式的线段;2.已知正方形的面积,通过计算其边长,根据边长裁剪,构造正方形;3.已知三角形的三边长(三边长 (I) Unconsciousness of Experimental Subjects (II) Experimental Background Through this experimental activity, students can further understand the relationship between the Pythagorean Theorem and irrational numbers.This experiment, students use their brains together, through calculation, fight a The process of spell, feel the application of the second radical in the graph.The basic steps of the activity are as follows: 1.Learn how to draw the line with the length of quadratic root on the number axis; 2. Know the area of ​​the square, According to the side cut, construct the square; 3. Triangular long sides (three sides long