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剪拼直角三角形把一张等边三角形纸片剪两刀就可以改拼成直角三角形纸片。这两刀如何剪呢?请想一想、试一试。
Scissor right angle triangle Triangle triangle cut a piece of paper can be spelled triangular paper at right angles. How to cut these two knives? Please think about it, give it a try.