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Calculate the perimeter of a square whose side length is four and a half metres.
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Remember that the perimeter of the square, in fact the perimeter of any shape, is the distance all the way around it.
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So in the case of a square, it’s the total of all four sides.
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We’re given the length of one of these sides in the question.
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We’re told to calculate the perimeter of the square whose side length is four and a half metres.
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We know that, with a square, all the side lengths are the same.
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So the perimeter of a shape is worth four lots of four and a half.
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To help us multiply by four quickly, we can partition four and a half into four and one-half.
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Four times four equals 16.
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And four lots of a half equals two.
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And if we add the two together, we get 18.
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All the side lengths of the square are the same length.
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So to find the perimeter of a square whose side length was four and a half metres, all we had to do was to multiply four and a half by four.
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The perimeter of the square of the distance all the way around is 18 metres.