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Question Number 28202 by naka3546 last updated on 21/Jan/18

Commented by naka3546 last updated on 21/Jan/18

$$Ifareathesmallestsquareis1{cm}^2.$$$$findtheareaofredregion.$$$$$$

Answered by mrW2 last updated on 22/Jan/18

Commented by mrW2 last updated on 22/Jan/18

$$redarea=(\frac{\pi 3^2}{4}-\frac{3\times 3}{2})-(\frac{\pi 1^2}{4}-\frac{1\times 1}{2})$$$$=\frac{9\pi }{4}-\frac{9}{2}-\frac{\pi }{4}+\frac{1}{2}$$$$=2(\pi -2)$$$$\approx 2.28$$

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