Which of the following statements are true for using proportions to solve for missing measures? Select three options.

In a proportion, the two ratios are equal, so C is true. To compare corresponding dimensions correctly, put matching measures in the same positions in both ratios—for example, original over enlarged in each—so B is true. An enlargement or reduction keeps corresponding dimensions proportional, meaning they all use the same scale factor, so D is true. A reverses the matching positions, and E is false because the scale factor does not vary between ratios.

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