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Question Number 186442 by Mingma last updated on 04/Feb/23

Answered by HeferH last updated on 04/Feb/23

Commented by HeferH last updated on 04/Feb/23

$${\left(\frac{11}{2}\right)}^2-r^2=r^2-4+{\left(\frac{3}{2}\right)}^2$$$$r^2=16$$$$Yellow=\frac{r^2\pi }{2}=8\pi u^2$$

Answered by mr W last updated on 04/Feb/23

$$r^2=\frac{(a+b+c)b+2ac}{4}$$$$=\frac{(5+4+2)\times 4+2\times 5\times 2}{4}=16$$$$yellowarea=\frac{\pi r^2}{2}=8\pi$$

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