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Rectangle with length =11cm and width =4cm when both dimensions are trippled
10 years ago

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Steve
well, just triple each dimension

(11*3)(4*3) = (11*4)*3^2

since area involves two dimensions, it scales as the square of the linear dimension

Perimeter, being just length, just uses the scale factor

2(3*11+3*4) = 3*2(11+4)
10 years ago

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