Question

ABCDA'B'C'D'- paralelipiped dreptunghic
cum scot acel 153 de sub radical?

Answer 1

Răspuns:

Cine te-a pus să-l bagi acolo? :))

d^2 = L^2 + l^2 + h^2

169 = L^2 + 9 + 144

L^2 = 169 - 153

L^2 = 16 =>L=4 cm

Answer 2

$\it \sqrt{L^2+153}=13 \Rightarrow (\sqrt{L^2+153})^2=13^2 \Rightarrow L^2+153=169|_{-153} \Rightarrow\\ \\ \Rightarrow L^2=16=4^2 \Rightarrow L=4\ cm$