Civil Service Exam Reviewer · Ratio and Proportion · hard

Two similar rectangles have corresponding sides in the ratio 1 : 2. What is the ratio of their areas?

  1. 1 : 2
  2. 1 : 8
  3. 1 : 4
  4. 2 : 4

Answer

C. 1 : 4

Solution

For similar figures, areas scale as the square of the side ratio: 1 : 4.

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