SSAT Math Question 366: Answer and Explanation

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Question: 366

10. The perimeter of a hexagon is 42 units. If the length of each side is reduced by 3 units, what is the perimeter of the new figure?

  • A. 20
  • B. 24
  • C. 30
  • D. 36

Correct Answer: B

Explanation:

B

As there are six sides to a hexagon and each side is reduced by 3, the total reduction will be 18. 42 – 18 = 24.

You can plug in for each of the 6 sides, making sure that the sides add up to 42. To keep things simple, pick the same number: 7. If each side is reduced by 3, the new sides will be 4, resulting in a perimeter of 24.

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