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CSET Multiple Subjects Subtest 2 Math And Science Practice Test

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In two similar triangles with scale factor 3, a side length is 4 in the smaller triangle. What is the corresponding length in the larger triangle?
Correct Answer:
12
Explanation:
When two triangles are similar with a scale factor of 3, every corresponding length in the larger triangle is three times the length in the smaller one. So a side that measures 4 in the smaller triangle becomes 4 × 3 = 12 in the larger triangle. The other numbers don’t fit because they would require multiplying by 2, 1, or another non-multiple of 3. Therefore, the corresponding length is 12 units.

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