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calculati inaltimea unui triunghi echilateral cu latura de 12 radical cu 3 cm​

Răspuns :

[tex] \boxed{\boldsymbol {h = \dfrac{l \sqrt{3} }{2}}} [/tex]

[tex]l = 12 \sqrt{3} \: cm[/tex]

[tex]\Longrightarrow h = \dfrac{ \not12 \sqrt{3} \cdot \sqrt{3} }{ \not2} = 6 \cdot 3 = \boldsymbol {18 \: cm} [/tex]