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Unit Conversion, SM-Bank 002

A circle with radius 1 cm, has an area of \(\pi\) square centimetres.

Using the conversion ratio, 1 cm² = 100 mm², express the area of the circle in square millimetres.  (1 mark)

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\(100\pi\ \text{mm}^{2}\)

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\(\pi\ \text{cm}^{2}\) \(= \pi \times 100\ \text{mm}^2\)  
  \(=100\pi\ \text{mm}^{2}\)