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The perimeter is when you add all the sides up. so the formula is L+W+L+W=P. (P = 2W + 2L)

In this case it would be 11+3+11+3= 28 cm

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9y ago
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Wiki User

9y ago

I assume you mean a rectangle. Just add the length of all four sides - in the case of a rectangle, that's equal to twice the length + twice the width.

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Anonymous

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4y ago

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Anonymous

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4y ago

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Q: What is the perimeter of a rectangle 11 cm by 3 cm?
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