Question

Dau Coroana,Urgent,Dau multe puncte dar vreau sa fiti sigur ca e corect inainte sa postati raspunsul.

Answer 1

Răspuns:

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Answer 2

$\it b)\ \ AC=16\sqrt2\ cm\ (diagonala\ bazei);\ \ AO=8\sqrt2\ cm\\ \\ \Delta VOA-dreptunghic,\ \hat O=90^o\ \stackrel{TP}{\Longrightarrow}\ VA^2=VO^2+AO^2=6^2+(8\sqrt2)^2=\\ \\ =36+128=164 \Rightarrow VA=\sqrt{164}=\sqrt{4\cdot41}=2\sqrt{41}\ cm$

$\it c)\ Fie \ M-mijlocul\ laturii\ BC \Rightarrow a_b=OM=\dfrac{AB}{2}=\dfrac{16}{2}=8cm$

$\it d)\ \ \Delta VOM-pitagoreic,\ (6,\ 8,\ 10) \Rightarrow a_p=VM=10cm$

$\it e)\ \ \mathcal{A}_{\ell}=4\cdot\mathcal{A}_{BVC}=4\cdot\dfrac{BC\cdot VM}{2}=4\cdot\dfrac{16\cdot10}{2}=2\cdot160=320\ cm^2$

$\it f)\ \ \mathcal{A}_{t}= \mathcal{A}_{\ell}+ \mathcal{A}_{b}\\ \\ \mathcal{A}_{b}=16^2=256\ cm^2$