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People's Education Edition Ninth Grade Volume II Mathematics Chapter 27 similar triangles Exercise 27.2 The answer is urgent! ! ! ! ! ! ! ! !
1 4 times 1 times 125 and 20.

2 (1) similar (2) dissimilar (3) dissimilar

3( 1) Similar (2)y=98 degrees x=40.5 degrees

Because of DE//BC, triangle ADE is similar to triangle ABC (formula).

5 AEF AGH AIJ ABC is similar because EF//GH//IJ//BC.

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