Question

Perimetrul unui triunghi echilateral este egal cu 12 cm. Inaltimea triunghiului ar lungimea egala cu

Answer 1

P(echilateral)=12=>l=12:3=4cm
$h^{2} = 4^{2} - (\frac{4}{2}) ^{2} =\ \textgreater \ h= \sqrt{16-4}=\ \textgreater \ h= \sqrt{12} =\ \textgreater \ h=2 \sqrt{3}$

Answer 2

 [tex]1)...\;P_{\Delta}=3\cdot{l_{\Delta}}=12cm\;\;\rightarrow\;\;l_{\Delta}=4cm\;;\\ 2)...\;\;\;\;\;\;\;\;\;\;\;\;\;\;h_{\Delta}=\frac{4cm\cdot\sqrt3}{2}=2\sqrt3cm\;;[/tex]