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I have a question about my son's geometry?

My son got the following question incorrect on a geometry test, and I'm wondering whether anyone can explain why:

Jose wants to put a fence around his rectangular garden. His garden measures 33ft by 39ft. The garden has a path around it that is 3ft wide. How much fencing material does Jose need to enclose the garden and path?

We figured 33ft + 3ft on two sides (72 ft) plus 39ft + 3ft on the other two sides (84 ft), added together is 156 ft. But that was marked incorrect. Can anyone explain why? Thanks.

Update:

Thank you for the answer. You're absolutely right, and I feel like a dumba$$ now. Don't know how I missed it. I'll choose you as the best answer ASAP.

2 Answers

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  • 9 years ago
    Favorite Answer

    The sides next to the 33 ft side of the garden will be 33 + 3 + 3 = 39 ft (the fence extends 3 ft on both ends). The other sides will be 39 + 3 + 3 = 45 ft each.

    So you'd do 39 x 2 + 45 x 2

  • Anonymous
    7 years ago

    complex step. look into yahoo and bing. that can help!

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