暑假备课时,我发现了华师大版《数学》八年级第14章《勾股定理》复习题中有一道题目是错题.现借贵刊一角,指明这个错误,并希望教材再版时得到更正.教材中的题目是:3.试判断下列三角形是否是直角三角形:(1)三边长为m2+n2、mn、m2-n(m>n>0); During the preparation for the summer vacation, I found that there was a problem in the review questions of the 14th chapter “Pythagorean Theorem” in the eighth grade of Mathematics in the Normal University. Now I pointed out this mistake in the corner of your magazine and I hope that when the textbook is reprinted, Correct. The text of the subject is: 3 try to determine whether the following triangle is a right triangle: (1) the length of the three sides m2 + n2, mn, m2-n (m> n> 0);