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Dau coroana! Urgent! ​

Dau Coroana Urgent class=

Răspuns :

AB=CB=x

x²+x²=8²

x²+x=8

[tex]2x = \sqrt{8} \\ 2x = 2 \sqrt{2} \\ x = \sqrt{2} [/tex]

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[tex]l = \sqrt{2} [/tex]

=>

Perimetru=

[tex] \sqrt{2} + \sqrt{2} + \sqrt{2} + \sqrt{2} = 4 \sqrt{2} [/tex]

=> Aria=

[tex] \sqrt{2 } {}^{2} = 2cm {}^{2} [/tex]