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老师:同学们!今天我们探讨形如a~2/b~2=c/d的比例式的证明问题.这类问题平时会遇到,也经常出现在近两年的中考试题中.由于a~2/b~2=c/d的左边是平方比的形式,加上有些问题本身较为复杂,不少同学感到难以下手.
Teacher: Classmates! Today we discuss the problem of proportional proofs in the form of a~2/b~2=c/d. This type of problem is usually encountered and often appears in the examination questions in the last two years. To the left of ~2/b~2=c/d is the form of the squared ratio, plus some of the problems are more complex and many students find it difficult to start.