Question

O piramida patrulatera regulata are aria laterala egala cu 240 cm la a doua si aria totala egala cu 384 cm la a doua. machia bazei piramidei este egala cu... cm
va rog, ajutati-ma repede

Answer 1

Ab = L² = 384 - 240 = 144 cm²

L² = 144 cm² => L = √144 = √12² = 12 cm

Answer 2

$\itr \mathcal{A}_t= \mathcal{A}_\ell+\mathcal{A}_b\ \Rightarrow\ 384=240+\ell^2|_{-240} \Rightarrow\ \ell^2=144=12^2\ \Rightarrow \ell=12\ cm$