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The perimeter is a total measurement of all sides of an object or figure. You didn't indicate what you were measuring so it is difficult to answer your question. Different objects have different sides and different lengths. Assuming, however, that you are finding the perimeter of a square with a side of 6.9 cm, then the perimeter would be 6.9 x 4, since all sides of a square are the same. 6.9 cm x 4 = 27.6 cm. To find the perimeter of a rectangle, multiply 2 times the length and add 2 times the width.

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Q: What is the perimeter if a side is 6.9 cm?
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