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Question Number 193387 by Mingma last updated on 12/Jun/23

Commented by Frix last updated on 12/Jun/23

$$\mathrm{The}\mathrm{circle}\mathrm{is}\mathrm{the}\mathrm{circumcircle}\mathrm{of}\mathrm{a}\mathrm{triangle}:$$$$a=6$$$$b=6\sqrt{7}$$$$c=18$$$$\Rightarrow$$$$R=2\sqrt{21}$$$$\mathrm{Area}\mathrm{of}\mathrm{the}\mathrm{semi}\mathrm{circle}=42\pi$$

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