Question

Calculati inaltimea unui tetraedru regulat cu muchia de 10 cm

Answer 1

$a=10 \ cm \\ h-? \\ h=a \cdot \sqrt{ \frac{2}{3} } \\ h=10 \cdot \sqrt \frac{2}{3} = \sqrt{100} \cdot \sqrt\frac{2}{3}}= \boxed{ \sqrt{ \frac{200}{3} } \ cm}$