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The height of a rectangular prism with a 20 cm by 12 cm base and a 30 cm diagonal.find the unknown dimension

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[tex]30^2=20^2+12^2+x^2[/tex] or [tex]x^2=900-400-144=356[/tex] or [tex]x=\sqrt{356}[/tex] cm. You might get some factors out if you wish.

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