Rectilinear Figures, SM-Bank 010

A rectangle has a length of 25 cm and a width of 20 cm.

A square has the same perimeter as this rectangle.

What is the side length of this square in centimetres? (2 marks)

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\(22.5\ \text{cm}\)

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\(\text{Perimeter of rectangle}\)	\(= (2\times 25) + (2\times 20)\)
	\(=90\ \text{cm}\)

\(\therefore\ \text{Side length of square}\)	\(=\dfrac{90}{4}\)
	\(=22.5\ \text{cm}\)