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Calculati inaltimea unui tetraedru regulat cu muchia de 10 cm

Răspuns :

[tex]a=10 \ cm \\ h-? \\ h=a \cdot \sqrt{ \frac{2}{3} } \\ h=10 \cdot \sqrt \frac{2}{3} = \sqrt{100} \cdot \sqrt\frac{2}{3}}= \boxed{ \sqrt{ \frac{200}{3} } \ cm} [/tex]