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In the similarity of junior high school mathematics, what does it mean that the corresponding two sides in the definition of similarity are proportional?
A triangle with two proportional sides and equal included angles is similar, and the two sides are proportional, that is, the ratio of the two groups of corresponding sides is equal. (called SAS edge, no edge)
Remember: two conditions must be met: 1 The two groups of corresponding edges are in proportion, and the corresponding edges are in equal proportion.
2. The included angles of two groups of corresponding edges are equal.