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.